diff --git a/VERSION-TODO.md b/VERSION-TODO.md
index d434ff587..6694b146f 100644
--- a/VERSION-TODO.md
+++ b/VERSION-TODO.md
@@ -219,6 +219,18 @@ Please give feedback on the upcoming changes if you have concerns about breaking
 
 ## 0.61.6
 
+* Add: `HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES` default `true` and
+  `HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES` default `true`. When `false` then
+  corresponding reference link text in heading text used for generating heading id is not
+  trimmed.
+* Add: `HtmlRenderer.HEADER_ID_ADD_EMOJI_SHORTCUT` default `false` When `true` then emjoi nodes
+  add emoji shortcut to collected text for heading id.
+* Fix: `ParserEmulationProfile.GITHUB`
+  * Set `HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES` to `false` because GitHub does
+    not trim trailing spaces for generating heading ids.
+  * `Emoji` node to generate text for heading id consisting of the emoji shortcut, for GitHub
+    compatibility.
+  * Fix: `ImageRef` not to add text to heading text for heading id generation
 * Fix: add more information to `MarkdownParagraph.resolveTrackedOffsetsEdit` assert failures to
   allow better diagnostics in reported stack traces.
 * Fix: disable wrapping of multiline URL image links
@@ -227,11 +239,13 @@ Please give feedback on the upcoming changes if you have concerns about breaking
   parsing.
   * Fix: `TablesExtension` to accept non-indenting leading spaces on all table rows. This
     results in previously non-table text as valid table texts:
-  
+
     ```markdown
     Abc|Def
       |---|---
     ```
+* Fix: `LinkRef` and `ImageRef` changing spaces to ` ` for wrap formatting when not part of
+  a `Paragraph`, ie. in heading text.
 
 ## 0.61.4
 
diff --git a/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/ComboExtraSpec2Test.java b/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/ComboExtraSpec2Test.java
new file mode 100644
index 000000000..8475b54d0
--- /dev/null
+++ b/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/ComboExtraSpec2Test.java
@@ -0,0 +1,29 @@
+package com.vladsch.flexmark.core.test.util.renderer;
+
+import com.vladsch.flexmark.html.HtmlRenderer;
+import com.vladsch.flexmark.test.util.spec.ResourceLocation;
+import com.vladsch.flexmark.test.util.spec.SpecExample;
+import com.vladsch.flexmark.util.data.DataHolder;
+import com.vladsch.flexmark.util.data.MutableDataSet;
+import org.jetbrains.annotations.NotNull;
+import org.junit.runners.Parameterized;
+
+import java.util.List;
+
+final public class ComboExtraSpec2Test extends CoreRendererSpecTest {
+    final private static String SPEC_RESOURCE = "/core_extra_ast_spec2.md";
+    final public static @NotNull ResourceLocation RESOURCE_LOCATION = ResourceLocation.of(SPEC_RESOURCE);
+
+    final private static DataHolder OPTIONS = new MutableDataSet()
+            .set(HtmlRenderer.PERCENT_ENCODE_URLS, true)
+            .toImmutable();
+
+    public ComboExtraSpec2Test(@NotNull SpecExample example) {
+        super(example, null, OPTIONS);
+    }
+
+    @Parameterized.Parameters(name = "{0}")
+    public static List<Object[]> data() {
+        return getTestData(RESOURCE_LOCATION);
+    }
+}
diff --git a/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererSpecTest.java b/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererSpecTest.java
index 1cf50d9b8..b0a57c121 100644
--- a/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererSpecTest.java
+++ b/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererSpecTest.java
@@ -24,6 +24,23 @@ public abstract class CoreRendererSpecTest extends RendererSpecTest {
     static {
         ArrayList<String> userTags = new ArrayList<>(Parser.HTML_BLOCK_TAGS.get(null));
         userTags.add("tag");
+        optionsMap.put("heading-ids", new MutableDataSet().set(HtmlRenderer.RENDER_HEADER_ID, true));
+        optionsMap.put("heading-ids-no-dupe-dashes", new MutableDataSet().set(HtmlRenderer.HEADER_ID_GENERATOR_NO_DUPED_DASHES, true));
+        optionsMap.put("heading-ids-no-non-ascii-lowercase", new MutableDataSet().set(HtmlRenderer.HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE, false));
+        optionsMap.put("heading-ids-no-trim-start", new MutableDataSet().set(HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES, false));
+        optionsMap.put("heading-ids-no-trim-end", new MutableDataSet().set(HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES, false));
+        optionsMap.put("heading-ids-emoji", new MutableDataSet().set(HtmlRenderer.HEADER_ID_ADD_EMOJI_SHORTCUT, true));
+        optionsMap.put("heading-ids-github", new MutableDataSet()
+                .set(HtmlRenderer.HEADER_ID_GENERATOR_TO_DASH_CHARS, " -")
+                .set(HtmlRenderer.HEADER_ID_GENERATOR_NON_DASH_CHARS, "_")
+                .set(HtmlRenderer.HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE, false)
+
+                // GitHub does not trim trailing spaces of Ref Links in Headings for ID generation
+                .set(HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES, false)
+                // GitHub adds emoji shortcut text to heading id
+                .set(HtmlRenderer.HEADER_ID_ADD_EMOJI_SHORTCUT, true)
+        );
+        
         optionsMap.put("user-block-tags", new MutableDataSet().set(Parser.HTML_BLOCK_TAGS, userTags));
         optionsMap.put("obfuscate-email", new MutableDataSet().set(HtmlRenderer.OBFUSCATE_EMAIL, true));
         optionsMap.put("keep-blank-lines", new MutableDataSet().set(Parser.BLANK_LINES_IN_AST, true));
diff --git a/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererTestSuite.java b/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererTestSuite.java
index f546f8060..9e8fc72dc 100644
--- a/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererTestSuite.java
+++ b/flexmark-core-test/src/test/java/com/vladsch/flexmark/core/test/util/renderer/CoreRendererTestSuite.java
@@ -6,6 +6,7 @@
 @RunWith(Suite.class)
 @Suite.SuiteClasses({
         ComboExtraSpecTest.class,
+        ComboExtraSpec2Test.class,
         CoreCompatibilityTestSuite.class,
         ComboIssuesSpecTest.class,
         FullOrigSpecCoreTest.class,
diff --git a/flexmark-core-test/src/test/resources/core_extra_ast_spec2.md b/flexmark-core-test/src/test/resources/core_extra_ast_spec2.md
new file mode 100644
index 000000000..09042ac30
--- /dev/null
+++ b/flexmark-core-test/src/test/resources/core_extra_ast_spec2.md
@@ -0,0 +1,636 @@
+---
+title: Extra Core Test Spec
+author: Vladimir Schneider
+version: 0.2
+date: '2016-06-06'
+license: '[CC-BY-SA 4.0](http://creativecommons.org/licenses/by-sa/4.0/)'
+...
+
+---
+
+# Extra tests
+
+## Flexmark Spec
+
+## Heading ID
+
+### Default
+
+Heading ID option
+
+```````````````````````````````` example(Heading ID - Default: 1) options(heading-ids)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 160]
+  Heading[0, 75] textOpen:[0, 2, "##"] text:[3, 75, "2.0. References [ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 75] referenceOpen:[19, 20, "["] reference:[21, 73, "There is a {} reference showing but is Нет copy-able"] referenceClose:[74, 75, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[77, 158] refOpen:[77, 78, "["] ref:[78, 130, "There is a {} reference showing but is Нет copy-able"] refClose:[130, 132, "]:"] url:[133, 158, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Default: 2) options(heading-ids)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 162]
+  Heading[0, 77] textOpen:[0, 2, "##"] text:[3, 77, "2.0. References [  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 77] referenceOpen:[19, 20, "["] reference:[22, 74, "There is a {} reference showing but is Нет copy-able"] referenceClose:[76, 77, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[79, 160] refOpen:[79, 80, "["] ref:[80, 132, "There is a {} reference showing but is Нет copy-able"] refClose:[132, 134, "]:"] url:[135, 160, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Default: 3) options(heading-ids)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 216]
+  Heading[0, 131] textOpen:[0, 2, "##"] text:[3, 131, "2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 131] textOpen:[19, 20, "["] text:[21, 73, "There is a {} reference showing but is Нет copy-able"] textClose:[74, 75, "]"] referenceOpen:[75, 76, "["] reference:[77, 129, "There is a {} reference showing but is Нет copy-able"] referenceClose:[130, 131, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[133, 214] refOpen:[133, 134, "["] ref:[134, 186, "There is a {} reference showing but is Нет copy-able"] refClose:[186, 188, "]:"] url:[189, 214, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Default: 4) options(heading-ids)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 220]
+  Heading[0, 135] textOpen:[0, 2, "##"] text:[3, 135, "2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 135] textOpen:[19, 20, "["] text:[22, 74, "There is a {} reference showing but is Нет copy-able"] textClose:[76, 77, "]"] referenceOpen:[77, 78, "["] reference:[80, 132, "There is a {} reference showing but is Нет copy-able"] referenceClose:[134, 135, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[137, 218] refOpen:[137, 138, "["] ref:[138, 190, "There is a {} reference showing but is Нет copy-able"] refClose:[190, 192, "]:"] url:[193, 218, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### No Duped Dashes
+
+Heading ID option
+
+```````````````````````````````` example(Heading ID - No Duped Dashes: 1) options(heading-ids, heading-ids-no-dupe-dashes, heading-ids-no-dupe-dashes)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 160]
+  Heading[0, 75] textOpen:[0, 2, "##"] text:[3, 75, "2.0. References [ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 75] referenceOpen:[19, 20, "["] reference:[21, 73, "There is a {} reference showing but is Нет copy-able"] referenceClose:[74, 75, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[77, 158] refOpen:[77, 78, "["] ref:[78, 130, "There is a {} reference showing but is Нет copy-able"] refClose:[130, 132, "]:"] url:[133, 158, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Duped Dashes: 2) options(heading-ids, heading-ids-no-dupe-dashes)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 162]
+  Heading[0, 77] textOpen:[0, 2, "##"] text:[3, 77, "2.0. References [  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 77] referenceOpen:[19, 20, "["] reference:[22, 74, "There is a {} reference showing but is Нет copy-able"] referenceClose:[76, 77, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[79, 160] refOpen:[79, 80, "["] ref:[80, 132, "There is a {} reference showing but is Нет copy-able"] refClose:[132, 134, "]:"] url:[135, 160, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Duped Dashes: 3) options(heading-ids, heading-ids-no-dupe-dashes)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 216]
+  Heading[0, 131] textOpen:[0, 2, "##"] text:[3, 131, "2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 131] textOpen:[19, 20, "["] text:[21, 73, "There is a {} reference showing but is Нет copy-able"] textClose:[74, 75, "]"] referenceOpen:[75, 76, "["] reference:[77, 129, "There is a {} reference showing but is Нет copy-able"] referenceClose:[130, 131, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[133, 214] refOpen:[133, 134, "["] ref:[134, 186, "There is a {} reference showing but is Нет copy-able"] refClose:[186, 188, "]:"] url:[189, 214, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Duped Dashes: 4) options(heading-ids, heading-ids-no-dupe-dashes)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 220]
+  Heading[0, 135] textOpen:[0, 2, "##"] text:[3, 135, "2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 135] textOpen:[19, 20, "["] text:[22, 74, "There is a {} reference showing but is Нет copy-able"] textClose:[76, 77, "]"] referenceOpen:[77, 78, "["] reference:[80, 132, "There is a {} reference showing but is Нет copy-able"] referenceClose:[134, 135, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[137, 218] refOpen:[137, 138, "["] ref:[138, 190, "There is a {} reference showing but is Нет copy-able"] refClose:[190, 192, "]:"] url:[193, 218, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### No Lowercase
+
+Heading ID option
+
+```````````````````````````````` example(Heading ID - No Lowercase: 1) options(heading-ids, heading-ids-no-non-ascii-lowercase)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 160]
+  Heading[0, 75] textOpen:[0, 2, "##"] text:[3, 75, "2.0. References [ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 75] referenceOpen:[19, 20, "["] reference:[21, 73, "There is a {} reference showing but is Нет copy-able"] referenceClose:[74, 75, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[77, 158] refOpen:[77, 78, "["] ref:[78, 130, "There is a {} reference showing but is Нет copy-able"] refClose:[130, 132, "]:"] url:[133, 158, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Lowercase: 2) options(heading-ids, heading-ids-no-non-ascii-lowercase)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 162]
+  Heading[0, 77] textOpen:[0, 2, "##"] text:[3, 77, "2.0. References [  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 77] referenceOpen:[19, 20, "["] reference:[22, 74, "There is a {} reference showing but is Нет copy-able"] referenceClose:[76, 77, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[79, 160] refOpen:[79, 80, "["] ref:[80, 132, "There is a {} reference showing but is Нет copy-able"] refClose:[132, 134, "]:"] url:[135, 160, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Lowercase: 3) options(heading-ids, heading-ids-no-non-ascii-lowercase)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 216]
+  Heading[0, 131] textOpen:[0, 2, "##"] text:[3, 131, "2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 131] textOpen:[19, 20, "["] text:[21, 73, "There is a {} reference showing but is Нет copy-able"] textClose:[74, 75, "]"] referenceOpen:[75, 76, "["] reference:[77, 129, "There is a {} reference showing but is Нет copy-able"] referenceClose:[130, 131, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[133, 214] refOpen:[133, 134, "["] ref:[134, 186, "There is a {} reference showing but is Нет copy-able"] refClose:[186, 188, "]:"] url:[189, 214, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Lowercase: 4) options(heading-ids, heading-ids-no-non-ascii-lowercase)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 220]
+  Heading[0, 135] textOpen:[0, 2, "##"] text:[3, 135, "2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 135] textOpen:[19, 20, "["] text:[22, 74, "There is a {} reference showing but is Нет copy-able"] textClose:[76, 77, "]"] referenceOpen:[77, 78, "["] reference:[80, 132, "There is a {} reference showing but is Нет copy-able"] referenceClose:[134, 135, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[137, 218] refOpen:[137, 138, "["] ref:[138, 190, "There is a {} reference showing but is Нет copy-able"] refClose:[190, 192, "]:"] url:[193, 218, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### No Duped Dashes, No Lowercase
+
+Heading ID option
+
+```````````````````````````````` example(Heading ID - No Duped Dashes, No Lowercase: 1) options(heading-ids, heading-ids-no-non-ascii-lowercase, heading-ids-no-dupe-dashes)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 160]
+  Heading[0, 75] textOpen:[0, 2, "##"] text:[3, 75, "2.0. References [ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 75] referenceOpen:[19, 20, "["] reference:[21, 73, "There is a {} reference showing but is Нет copy-able"] referenceClose:[74, 75, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[77, 158] refOpen:[77, 78, "["] ref:[78, 130, "There is a {} reference showing but is Нет copy-able"] refClose:[130, 132, "]:"] url:[133, 158, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Duped Dashes, No Lowercase: 2) options(heading-ids, heading-ids-no-non-ascii-lowercase, heading-ids-no-dupe-dashes)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 162]
+  Heading[0, 77] textOpen:[0, 2, "##"] text:[3, 77, "2.0. References [  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 77] referenceOpen:[19, 20, "["] reference:[22, 74, "There is a {} reference showing but is Нет copy-able"] referenceClose:[76, 77, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[79, 160] refOpen:[79, 80, "["] ref:[80, 132, "There is a {} reference showing but is Нет copy-able"] refClose:[132, 134, "]:"] url:[135, 160, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Duped Dashes, No Lowercase: 3) options(heading-ids, heading-ids-no-non-ascii-lowercase, heading-ids-no-dupe-dashes)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 216]
+  Heading[0, 131] textOpen:[0, 2, "##"] text:[3, 131, "2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 131] textOpen:[19, 20, "["] text:[21, 73, "There is a {} reference showing but is Нет copy-able"] textClose:[74, 75, "]"] referenceOpen:[75, 76, "["] reference:[77, 129, "There is a {} reference showing but is Нет copy-able"] referenceClose:[130, 131, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[133, 214] refOpen:[133, 134, "["] ref:[134, 186, "There is a {} reference showing but is Нет copy-able"] refClose:[186, 188, "]:"] url:[189, 214, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Duped Dashes, No Lowercase: 4) options(heading-ids, heading-ids-no-non-ascii-lowercase, heading-ids-no-dupe-dashes)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a-reference-showing-but-is-Нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 220]
+  Heading[0, 135] textOpen:[0, 2, "##"] text:[3, 135, "2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 135] textOpen:[19, 20, "["] text:[22, 74, "There is a {} reference showing but is Нет copy-able"] textClose:[76, 77, "]"] referenceOpen:[77, 78, "["] reference:[80, 132, "There is a {} reference showing but is Нет copy-able"] referenceClose:[134, 135, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[137, 218] refOpen:[137, 138, "["] ref:[138, 190, "There is a {} reference showing but is Нет copy-able"] refClose:[190, 192, "]:"] url:[193, 218, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### No Trim End
+
+Heading ID option
+
+```````````````````````````````` example(Heading ID - No Trim End: 1) options(heading-ids, heading-ids-no-trim-end)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able-">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 160]
+  Heading[0, 75] textOpen:[0, 2, "##"] text:[3, 75, "2.0. References [ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 75] referenceOpen:[19, 20, "["] reference:[21, 73, "There is a {} reference showing but is Нет copy-able"] referenceClose:[74, 75, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[77, 158] refOpen:[77, 78, "["] ref:[78, 130, "There is a {} reference showing but is Нет copy-able"] refClose:[130, 132, "]:"] url:[133, 158, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Trim End: 2) options(heading-ids, heading-ids-no-trim-end)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able--">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 162]
+  Heading[0, 77] textOpen:[0, 2, "##"] text:[3, 77, "2.0. References [  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 77] referenceOpen:[19, 20, "["] reference:[22, 74, "There is a {} reference showing but is Нет copy-able"] referenceClose:[76, 77, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[79, 160] refOpen:[79, 80, "["] ref:[80, 132, "There is a {} reference showing but is Нет copy-able"] refClose:[132, 134, "]:"] url:[135, 160, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Trim End: 3) options(heading-ids, heading-ids-no-trim-end)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able-">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 216]
+  Heading[0, 131] textOpen:[0, 2, "##"] text:[3, 131, "2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 131] textOpen:[19, 20, "["] text:[21, 73, "There is a {} reference showing but is Нет copy-able"] textClose:[74, 75, "]"] referenceOpen:[75, 76, "["] reference:[77, 129, "There is a {} reference showing but is Нет copy-able"] referenceClose:[130, 131, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[133, 214] refOpen:[133, 134, "["] ref:[134, 186, "There is a {} reference showing but is Нет copy-able"] refClose:[186, 188, "]:"] url:[189, 214, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Trim End: 4) options(heading-ids, heading-ids-no-trim-end)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references-there-is-a--reference-showing-but-is-нет-copy-able--">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 220]
+  Heading[0, 135] textOpen:[0, 2, "##"] text:[3, 135, "2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 135] textOpen:[19, 20, "["] text:[22, 74, "There is a {} reference showing but is Нет copy-able"] textClose:[76, 77, "]"] referenceOpen:[77, 78, "["] reference:[80, 132, "There is a {} reference showing but is Нет copy-able"] referenceClose:[134, 135, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[137, 218] refOpen:[137, 138, "["] ref:[138, 190, "There is a {} reference showing but is Нет copy-able"] refClose:[190, 192, "]:"] url:[193, 218, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### No Trim Start
+
+Heading ID option
+
+```````````````````````````````` example(Heading ID - No Trim Start: 1) options(heading-ids, heading-ids-no-trim-start)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references--there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 160]
+  Heading[0, 75] textOpen:[0, 2, "##"] text:[3, 75, "2.0. References [ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 75] referenceOpen:[19, 20, "["] reference:[21, 73, "There is a {} reference showing but is Нет copy-able"] referenceClose:[74, 75, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[77, 158] refOpen:[77, 78, "["] ref:[78, 130, "There is a {} reference showing but is Нет copy-able"] refClose:[130, 132, "]:"] url:[133, 158, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Trim Start: 2) options(heading-ids, heading-ids-no-trim-start)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references---there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 162]
+  Heading[0, 77] textOpen:[0, 2, "##"] text:[3, 77, "2.0. References [  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 77] referenceOpen:[19, 20, "["] reference:[22, 74, "There is a {} reference showing but is Нет copy-able"] referenceClose:[76, 77, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[79, 160] refOpen:[79, 80, "["] ref:[80, 132, "There is a {} reference showing but is Нет copy-able"] refClose:[132, 134, "]:"] url:[135, 160, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Trim Start: 3) options(heading-ids, heading-ids-no-trim-start)
+## 2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references--there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 216]
+  Heading[0, 131] textOpen:[0, 2, "##"] text:[3, 131, "2.0. References [ There is a {} reference showing but is Нет copy-able ][ There is a {} reference showing but is Нет copy-able ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 131] textOpen:[19, 20, "["] text:[21, 73, "There is a {} reference showing but is Нет copy-able"] textClose:[74, 75, "]"] referenceOpen:[75, 76, "["] reference:[77, 129, "There is a {} reference showing but is Нет copy-able"] referenceClose:[130, 131, "]"]
+      Text[21, 73] chars:[21, 73, "There … -able"]
+  Reference[133, 214] refOpen:[133, 134, "["] ref:[134, 186, "There is a {} reference showing but is Нет copy-able"] refClose:[186, 188, "]:"] url:[189, 214, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - No Trim Start: 4) options(heading-ids, heading-ids-no-trim-start)
+## 2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="20-references---there-is-a--reference-showing-but-is-нет-copy-able">2.0. References <a href="https://www.example.com/0">There is a {} reference showing but is Нет copy-able</a></h2>
+.
+Document[0, 220]
+  Heading[0, 135] textOpen:[0, 2, "##"] text:[3, 135, "2.0. References [  There is a {} reference showing but is Нет copy-able  ][  There is a {} reference showing but is Нет copy-able  ]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 135] textOpen:[19, 20, "["] text:[22, 74, "There is a {} reference showing but is Нет copy-able"] textClose:[76, 77, "]"] referenceOpen:[77, 78, "["] reference:[80, 132, "There is a {} reference showing but is Нет copy-able"] referenceClose:[134, 135, "]"]
+      Text[22, 74] chars:[22, 74, "There … -able"]
+  Reference[137, 218] refOpen:[137, 138, "["] ref:[138, 190, "There is a {} reference showing but is Нет copy-able"] refClose:[190, 192, "]:"] url:[193, 218, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### Emoji
+
+Heading ID with emoji
+
+```````````````````````````````` example(Heading ID - Emoji: 1) options(heading-ids, heading-ids-emoji)
+## Heading with some_underscore
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-some-underscore">Heading with some_underscore</h2>
+.
+Document[0, 116]
+  Heading[0, 31] textOpen:[0, 2, "##"] text:[3, 31, "Heading with some_underscore"]
+    Text[3, 31] chars:[3, 31, "Headi … score"]
+  Reference[33, 114] refOpen:[33, 34, "["] ref:[34, 86, "There is a {} reference showing but is Нет copy-able"] refClose:[86, 88, "]:"] url:[89, 114, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Emoji: 2) options(heading-ids, heading-ids-emoji)
+## Heading with emoji :information_source:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-information-source">Heading with emoji :information_source:</h2>
+.
+Document[0, 127]
+  Heading[0, 42] textOpen:[0, 2, "##"] text:[3, 42, "Heading with emoji :information_source:"]
+    Text[3, 42] chars:[3, 42, "Headi … urce:"]
+  Reference[44, 125] refOpen:[44, 45, "["] ref:[45, 97, "There is a {} reference showing but is Нет copy-able"] refClose:[97, 99, "]:"] url:[100, 125, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Emoji: 3) options(heading-ids, heading-ids-emoji)
+## Heading with emoji :+1:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-1">Heading with emoji :+1:</h2>
+.
+Document[0, 111]
+  Heading[0, 26] textOpen:[0, 2, "##"] text:[3, 26, "Heading with emoji :+1:"]
+    Text[3, 26] chars:[3, 26, "Headi …  :+1:"]
+  Reference[28, 109] refOpen:[28, 29, "["] ref:[29, 81, "There is a {} reference showing but is Нет copy-able"] refClose:[81, 83, "]:"] url:[84, 109, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Emoji: 4) options(heading-ids, heading-ids-emoji)
+## Heading with emoji :-1:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji--1">Heading with emoji :-1:</h2>
+.
+Document[0, 111]
+  Heading[0, 26] textOpen:[0, 2, "##"] text:[3, 26, "Heading with emoji :-1:"]
+    Text[3, 26] chars:[3, 26, "Headi …  :-1:"]
+  Reference[28, 109] refOpen:[28, 29, "["] ref:[29, 81, "There is a {} reference showing but is Нет copy-able"] refClose:[81, 83, "]:"] url:[84, 109, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Emoji: 5) options(heading-ids, heading-ids-emoji)
+## Heading with emoji :100:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-100">Heading with emoji :100:</h2>
+.
+Document[0, 112]
+  Heading[0, 27] textOpen:[0, 2, "##"] text:[3, 27, "Heading with emoji :100:"]
+    Text[3, 27] chars:[3, 27, "Headi … :100:"]
+  Reference[29, 110] refOpen:[29, 30, "["] ref:[30, 82, "There is a {} reference showing but is Нет copy-able"] refClose:[82, 84, "]:"] url:[85, 110, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - Emoji: 6) options(heading-ids, heading-ids-emoji)
+## Heading with emoji :u5272:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-u5272">Heading with emoji :u5272:</h2>
+.
+Document[0, 114]
+  Heading[0, 29] textOpen:[0, 2, "##"] text:[3, 29, "Heading with emoji :u5272:"]
+    Text[3, 29] chars:[3, 29, "Headi … 5272:"]
+  Reference[31, 112] refOpen:[31, 32, "["] ref:[32, 84, "There is a {} reference showing but is Нет copy-able"] refClose:[84, 86, "]:"] url:[87, 112, "https://www.example.com/0"]
+````````````````````````````````
+
+
+### GitHub
+
+Heading ID with emoji
+
+```````````````````````````````` example(Heading ID - GitHub: 1) options(heading-ids, heading-ids-github)
+## Heading with some_underscore
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-some_underscore">Heading with some_underscore</h2>
+.
+Document[0, 116]
+  Heading[0, 31] textOpen:[0, 2, "##"] text:[3, 31, "Heading with some_underscore"]
+    Text[3, 31] chars:[3, 31, "Headi … score"]
+  Reference[33, 114] refOpen:[33, 34, "["] ref:[34, 86, "There is a {} reference showing but is Нет copy-able"] refClose:[86, 88, "]:"] url:[89, 114, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - GitHub: 2) options(heading-ids, heading-ids-github)
+## Heading with emoji :information_source:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-information_source">Heading with emoji :information_source:</h2>
+.
+Document[0, 127]
+  Heading[0, 42] textOpen:[0, 2, "##"] text:[3, 42, "Heading with emoji :information_source:"]
+    Text[3, 42] chars:[3, 42, "Headi … urce:"]
+  Reference[44, 125] refOpen:[44, 45, "["] ref:[45, 97, "There is a {} reference showing but is Нет copy-able"] refClose:[97, 99, "]:"] url:[100, 125, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - GitHub: 3) options(heading-ids, heading-ids-github)
+## Heading with emoji :+1:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-1">Heading with emoji :+1:</h2>
+.
+Document[0, 111]
+  Heading[0, 26] textOpen:[0, 2, "##"] text:[3, 26, "Heading with emoji :+1:"]
+    Text[3, 26] chars:[3, 26, "Headi …  :+1:"]
+  Reference[28, 109] refOpen:[28, 29, "["] ref:[29, 81, "There is a {} reference showing but is Нет copy-able"] refClose:[81, 83, "]:"] url:[84, 109, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - GitHub: 4) options(heading-ids, heading-ids-github)
+## Heading with emoji :-1:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji--1">Heading with emoji :-1:</h2>
+.
+Document[0, 111]
+  Heading[0, 26] textOpen:[0, 2, "##"] text:[3, 26, "Heading with emoji :-1:"]
+    Text[3, 26] chars:[3, 26, "Headi …  :-1:"]
+  Reference[28, 109] refOpen:[28, 29, "["] ref:[29, 81, "There is a {} reference showing but is Нет copy-able"] refClose:[81, 83, "]:"] url:[84, 109, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - GitHub: 5) options(heading-ids, heading-ids-github)
+## Heading with emoji :100:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-100">Heading with emoji :100:</h2>
+.
+Document[0, 112]
+  Heading[0, 27] textOpen:[0, 2, "##"] text:[3, 27, "Heading with emoji :100:"]
+    Text[3, 27] chars:[3, 27, "Headi … :100:"]
+  Reference[29, 110] refOpen:[29, 30, "["] ref:[30, 82, "There is a {} reference showing but is Нет copy-able"] refClose:[82, 84, "]:"] url:[85, 110, "https://www.example.com/0"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Heading ID - GitHub: 6) options(heading-ids, heading-ids-github)
+## Heading with emoji :u5272:
+
+[There is a {} reference showing but is Нет copy-able]: https://www.example.com/0
+
+.
+<h2 id="heading-with-emoji-u5272">Heading with emoji :u5272:</h2>
+.
+Document[0, 114]
+  Heading[0, 29] textOpen:[0, 2, "##"] text:[3, 29, "Heading with emoji :u5272:"]
+    Text[3, 29] chars:[3, 29, "Headi … 5272:"]
+  Reference[31, 112] refOpen:[31, 32, "["] ref:[32, 84, "There is a {} reference showing but is Нет copy-able"] refClose:[84, 86, "]:"] url:[87, 112, "https://www.example.com/0"]
+````````````````````````````````
+
+
diff --git a/flexmark-docx-converter/src/test/resources/docx_converter_issues_ast_spec.md b/flexmark-docx-converter/src/test/resources/docx_converter_issues_ast_spec.md
index dfe2fe862..a57d95d6a 100644
--- a/flexmark-docx-converter/src/test/resources/docx_converter_issues_ast_spec.md
+++ b/flexmark-docx-converter/src/test/resources/docx_converter_issues_ast_spec.md
@@ -2420,7 +2420,7 @@ TEXT :+1: TEXT
 
 .
 <w:body>
-    <w:bookmarkStart w:id="1" w:name="heading-1"/>
+    <w:bookmarkStart w:id="1" w:name="heading-1-"/>
     <w:bookmarkEnd w:id="1"/>
     <w:p>
         <w:pPr>
@@ -2470,7 +2470,7 @@ TEXT :+1: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="2" w:name="heading-2"/>
+    <w:bookmarkStart w:id="2" w:name="heading-2-"/>
     <w:bookmarkEnd w:id="2"/>
     <w:p>
         <w:pPr>
@@ -2520,7 +2520,7 @@ TEXT :+1: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="3" w:name="heading-3"/>
+    <w:bookmarkStart w:id="3" w:name="heading-3-"/>
     <w:bookmarkEnd w:id="3"/>
     <w:p>
         <w:pPr>
@@ -2570,7 +2570,7 @@ TEXT :+1: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="4" w:name="heading-4"/>
+    <w:bookmarkStart w:id="4" w:name="heading-4-"/>
     <w:bookmarkEnd w:id="4"/>
     <w:p>
         <w:pPr>
@@ -2620,7 +2620,7 @@ TEXT :+1: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="5" w:name="heading-5"/>
+    <w:bookmarkStart w:id="5" w:name="heading-5-"/>
     <w:bookmarkEnd w:id="5"/>
     <w:p>
         <w:pPr>
@@ -2670,7 +2670,7 @@ TEXT :+1: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="6" w:name="heading-6"/>
+    <w:bookmarkStart w:id="6" w:name="heading-6-"/>
     <w:bookmarkEnd w:id="6"/>
     <w:p>
         <w:pPr>
@@ -3514,7 +3514,7 @@ TEXT :basecamp: TEXT
 
 .
 <w:body>
-    <w:bookmarkStart w:id="1" w:name="heading-1"/>
+    <w:bookmarkStart w:id="1" w:name="heading-1-"/>
     <w:bookmarkEnd w:id="1"/>
     <w:p>
         <w:pPr>
@@ -3564,7 +3564,7 @@ TEXT :basecamp: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="2" w:name="heading-2"/>
+    <w:bookmarkStart w:id="2" w:name="heading-2-"/>
     <w:bookmarkEnd w:id="2"/>
     <w:p>
         <w:pPr>
@@ -3614,7 +3614,7 @@ TEXT :basecamp: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="3" w:name="heading-3"/>
+    <w:bookmarkStart w:id="3" w:name="heading-3-"/>
     <w:bookmarkEnd w:id="3"/>
     <w:p>
         <w:pPr>
@@ -3664,7 +3664,7 @@ TEXT :basecamp: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="4" w:name="heading-4"/>
+    <w:bookmarkStart w:id="4" w:name="heading-4-"/>
     <w:bookmarkEnd w:id="4"/>
     <w:p>
         <w:pPr>
@@ -3714,7 +3714,7 @@ TEXT :basecamp: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="5" w:name="heading-5"/>
+    <w:bookmarkStart w:id="5" w:name="heading-5-"/>
     <w:bookmarkEnd w:id="5"/>
     <w:p>
         <w:pPr>
@@ -3764,7 +3764,7 @@ TEXT :basecamp: TEXT
             </w:drawing>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="6" w:name="heading-6"/>
+    <w:bookmarkStart w:id="6" w:name="heading-6-"/>
     <w:bookmarkEnd w:id="6"/>
     <w:p>
         <w:pPr>
@@ -3886,7 +3886,7 @@ TEXT :+1: TEXT
 
 .
 <w:body>
-    <w:bookmarkStart w:id="1" w:name="heading-1"/>
+    <w:bookmarkStart w:id="1" w:name="heading-1-"/>
     <w:bookmarkEnd w:id="1"/>
     <w:p>
         <w:pPr>
@@ -3899,7 +3899,7 @@ TEXT :+1: TEXT
             <w:t>&#x1f44d;</w:t>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="2" w:name="heading-2"/>
+    <w:bookmarkStart w:id="2" w:name="heading-2-"/>
     <w:bookmarkEnd w:id="2"/>
     <w:p>
         <w:pPr>
@@ -3912,7 +3912,7 @@ TEXT :+1: TEXT
             <w:t>&#x1f44d;</w:t>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="3" w:name="heading-3"/>
+    <w:bookmarkStart w:id="3" w:name="heading-3-"/>
     <w:bookmarkEnd w:id="3"/>
     <w:p>
         <w:pPr>
@@ -3925,7 +3925,7 @@ TEXT :+1: TEXT
             <w:t>&#x1f44d;</w:t>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="4" w:name="heading-4"/>
+    <w:bookmarkStart w:id="4" w:name="heading-4-"/>
     <w:bookmarkEnd w:id="4"/>
     <w:p>
         <w:pPr>
@@ -3938,7 +3938,7 @@ TEXT :+1: TEXT
             <w:t>&#x1f44d;</w:t>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="5" w:name="heading-5"/>
+    <w:bookmarkStart w:id="5" w:name="heading-5-"/>
     <w:bookmarkEnd w:id="5"/>
     <w:p>
         <w:pPr>
@@ -3951,7 +3951,7 @@ TEXT :+1: TEXT
             <w:t>&#x1f44d;</w:t>
         </w:r>
     </w:p>
-    <w:bookmarkStart w:id="6" w:name="heading-6"/>
+    <w:bookmarkStart w:id="6" w:name="heading-6-"/>
     <w:bookmarkEnd w:id="6"/>
     <w:p>
         <w:pPr>
diff --git a/flexmark-ext-attributes/src/test/resources/ext_attributes_ast_spec.md b/flexmark-ext-attributes/src/test/resources/ext_attributes_ast_spec.md
index f3ca765e2..9e76cdbed 100644
--- a/flexmark-ext-attributes/src/test/resources/ext_attributes_ast_spec.md
+++ b/flexmark-ext-attributes/src/test/resources/ext_attributes_ast_spec.md
@@ -23,7 +23,8 @@ The attributes is a space separated list of attribute syntax of one of the follo
 
 <!--
 * `:attr=value` : equivalent to `style="attr: value"`
- -->
+-->
+
 **NOTE**: Handling of multiple value assignment for attributes depends on its name:
 
 * `class` values are accumulated as a space (` `) separated list.
@@ -1592,7 +1593,7 @@ Document[0, 15]
 Heading with emoji :+1:
 =======================
 .
-<h1 id="heading-with-emoji">Heading with emoji <img src="/img/plus1.png" alt="emoji people:+1" height="20" width="20" align="absmiddle" /></h1>
+<h1 id="heading-with-emoji-">Heading with emoji <img src="/img/plus1.png" alt="emoji people:+1" height="20" width="20" align="absmiddle" /></h1>
 .
 Document[0, 47]
   Heading[0, 47] text:[0, 23, "Heading with emoji :+1:"] textClose:[24, 47, "======================="]
@@ -1602,7 +1603,21 @@ Document[0, 47]
 ````````````````````````````````
 
 
-```````````````````````````````` example(Headings Tests: 3) options(no-text-attributes)
+```````````````````````````````` example Headings Tests: 3
+Heading with emoji :-1:
+=======================
+.
+<h1 id="heading-with-emoji-">Heading with emoji <img src="/img/-1.png" alt="emoji people:-1" height="20" width="20" align="absmiddle" /></h1>
+.
+Document[0, 47]
+  Heading[0, 47] text:[0, 23, "Heading with emoji :-1:"] textClose:[24, 47, "======================="]
+    Text[0, 19] chars:[0, 19, "Headi … moji "]
+    Emoji[19, 23] textOpen:[19, 20, ":"] text:[20, 22, "-1"] textClose:[22, 23, ":"]
+      Text[20, 22] chars:[20, 22, "-1"]
+````````````````````````````````
+
+
+```````````````````````````````` example(Headings Tests: 4) options(no-text-attributes)
 Heading{#id1} with multiple{#id2} anchors{#id3}
 ===============================================
 .
@@ -1622,7 +1637,7 @@ Document[0, 95]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 4
+```````````````````````````````` example Headings Tests: 5
 Heading{#id1} with multiple{#id2} anchors{#id3}
 ===============================================
 .
@@ -1645,7 +1660,7 @@ Document[0, 95]
 ````````````````````````````````
 
 
-```````````````````````````````` example(Headings Tests: 5) options(no-text-attributes)
+```````````````````````````````` example(Headings Tests: 6) options(no-text-attributes)
 Heading{#id1} with multiple{#id2 style="color:red"} anchors{#id3}
 =================================================================
 .
@@ -1666,7 +1681,7 @@ Document[0, 131]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 6
+```````````````````````````````` example Headings Tests: 7
 Heading{#id1} with multiple{#id2 style="color:red"} anchors{#id3}
 =================================================================
 .
@@ -1690,7 +1705,7 @@ Document[0, 131]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 7
+```````````````````````````````` example Headings Tests: 8
 Heading{#id1} with multiple{#id2 style="color:red"} anchors{#id3} {#id4}
 ========================================================================
 .
@@ -1716,7 +1731,7 @@ Document[0, 145]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 8
+```````````````````````````````` example Headings Tests: 9
 ### Heading with trailing { style='color:red' } More Text
 .
 <h3 id="heading-with-trailing--more-text"><span style="color:red">Heading with trailing </span> More Text</h3>
@@ -1731,7 +1746,7 @@ Document[0, 57]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 9
+```````````````````````````````` example Headings Tests: 10
 ### Heading with trailing{ style='color:red' } More Text
 .
 <h3 id="heading-with-trailing-more-text"><span style="color:red">Heading with trailing</span> More Text</h3>
@@ -1746,7 +1761,7 @@ Document[0, 56]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 10
+```````````````````````````````` example Headings Tests: 11
 ### Heading with trailing{ style='color:red' }
 .
 <h3 id="heading-with-trailing"><span style="color:red">Heading with trailing</span></h3>
@@ -1760,7 +1775,7 @@ Document[0, 46]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 11
+```````````````````````````````` example Headings Tests: 12
 ### Heading {#explicit-id}
 .
 <h3 id="explicit-id">Heading</h3>
@@ -1773,7 +1788,7 @@ Document[0, 26]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 12
+```````````````````````````````` example Headings Tests: 13
 ### Heading{#explicit-id}
 .
 <h3 id="heading"><span id="explicit-id">Heading</span></h3>
@@ -1787,7 +1802,7 @@ Document[0, 25]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 13
+```````````````````````````````` example Headings Tests: 14
 Heading {#explicit-id}
 ==============
 .
@@ -1801,7 +1816,7 @@ Document[0, 37]
 ````````````````````````````````
 
 
-```````````````````````````````` example Headings Tests: 14
+```````````````````````````````` example Headings Tests: 15
 Heading{#explicit-id}
 ==============
 .
@@ -2860,12 +2875,13 @@ Document[0, 35]
 <pre caption="Caption"><code class="language-plantuml"></code></pre>
 .
 Document[0, 35]
-  FencedCodeBlock[0, 15] open:[0, 3, "```"] info:[3, 11, "plantuml"] lines[0] close:[12, 15, "```"]
-  Paragraph[16, 35]
-    AttributesNode[16, 35] textOpen:[16, 17, "{"] text:[17, 34, "caption=\"Caption\""] textClose:[34, 35, "}"]
-      AttributeNode[17, 34] name:[17, 24, "caption"] sep:[24, 25, "="] valueOpen:[25, 26, "\""] value:[26, 33, "Caption"] valueClose:[33, 34, "\""]
+FencedCodeBlock[0, 15] open:[0, 3, "```"] info:[3, 11, "plantuml"] lines[0] close:[12, 15, "```"]
+Paragraph[16, 35]
+AttributesNode[16, 35] textOpen:[16, 17, "{"] text:[17, 34, "caption=\"Caption\""] textClose:[34, 35, "}"]
+AttributeNode[17, 34] name:[17, 24, "caption"] sep:[24, 25, "="] valueOpen:[25, 26, "\""] value:[26, 33, "Caption"] valueClose:[33, 34, "\""]
 ````````````````````````````````
 -->
+
 ```````````````````````````````` example(Fenced Code: 20) options(info-attributes, fenced-code-to-code)
 ```plantuml
 ```
diff --git a/flexmark-ext-emoji/src/main/java/com/vladsch/flexmark/ext/emoji/Emoji.java b/flexmark-ext-emoji/src/main/java/com/vladsch/flexmark/ext/emoji/Emoji.java
index dbf6413fd..06a9e10ee 100644
--- a/flexmark-ext-emoji/src/main/java/com/vladsch/flexmark/ext/emoji/Emoji.java
+++ b/flexmark-ext-emoji/src/main/java/com/vladsch/flexmark/ext/emoji/Emoji.java
@@ -1,15 +1,19 @@
 package com.vladsch.flexmark.ext.emoji;
 
+import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.util.ast.DelimitedNode;
-import com.vladsch.flexmark.util.ast.DoNotCollectText;
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
+import com.vladsch.flexmark.util.ast.TextContainer;
+import com.vladsch.flexmark.util.misc.BitFieldSet;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
+import com.vladsch.flexmark.util.sequence.builder.ISequenceBuilder;
 import org.jetbrains.annotations.NotNull;
 
 /**
  * An emoji node containing emoji shortcut text
  */
-public class Emoji extends Node implements DelimitedNode, DoNotCollectText {
+public class Emoji extends Node implements DelimitedNode, TextContainer {
     protected BasedSequence openingMarker = BasedSequence.NULL;
     protected BasedSequence text = BasedSequence.NULL;
     protected BasedSequence closingMarker = BasedSequence.NULL;
@@ -62,4 +66,14 @@ public BasedSequence getClosingMarker() {
     public void setClosingMarker(BasedSequence closingMarker) {
         this.closingMarker = closingMarker;
     }
+
+    @Override
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
+        if (BitFieldSet.any(flags, F_FOR_HEADING_ID)) {
+            if (HtmlRenderer.HEADER_ID_ADD_EMOJI_SHORTCUT.get(getDocument())) {
+                out.append(text);
+            }
+        }
+        return false;
+    }
 }
diff --git a/flexmark-ext-typographic/src/main/java/com/vladsch/flexmark/ext/typographic/TypographicSmarts.java b/flexmark-ext-typographic/src/main/java/com/vladsch/flexmark/ext/typographic/TypographicSmarts.java
index 44e066522..1f0e42527 100644
--- a/flexmark-ext-typographic/src/main/java/com/vladsch/flexmark/ext/typographic/TypographicSmarts.java
+++ b/flexmark-ext-typographic/src/main/java/com/vladsch/flexmark/ext/typographic/TypographicSmarts.java
@@ -2,6 +2,7 @@
 
 import com.vladsch.flexmark.util.ast.DoNotAttributeDecorate;
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TypographicText;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.Escaping;
@@ -34,7 +35,7 @@ public TypographicSmarts(BasedSequence chars, String typographicText) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         if (any(flags, F_NODE_TEXT)) {
             out.append(getChars());
         } else {
diff --git a/flexmark-ext-wikilink/src/main/java/com/vladsch/flexmark/ext/wikilink/WikiNode.java b/flexmark-ext-wikilink/src/main/java/com/vladsch/flexmark/ext/wikilink/WikiNode.java
index fe41c8410..fd579c1f7 100644
--- a/flexmark-ext-wikilink/src/main/java/com/vladsch/flexmark/ext/wikilink/WikiNode.java
+++ b/flexmark-ext-wikilink/src/main/java/com/vladsch/flexmark/ext/wikilink/WikiNode.java
@@ -2,6 +2,7 @@
 
 import com.vladsch.flexmark.util.ast.DoNotDecorate;
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.misc.CharPredicate;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
@@ -212,7 +213,7 @@ public void setLinkChars(BasedSequence linkChars, boolean allowAnchors, boolean
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         int urlType = flags & F_LINK_TEXT_TYPE;
 
         BasedSequence text;
diff --git a/flexmark-formatter-test-suite/src/test/java/com/vladsch/flexmark/formatter/test/suite/ComboFormatterIssueSpecTest.java b/flexmark-formatter-test-suite/src/test/java/com/vladsch/flexmark/formatter/test/suite/ComboFormatterIssueSpecTest.java
index 77ee83d08..5930cd79b 100644
--- a/flexmark-formatter-test-suite/src/test/java/com/vladsch/flexmark/formatter/test/suite/ComboFormatterIssueSpecTest.java
+++ b/flexmark-formatter-test-suite/src/test/java/com/vladsch/flexmark/formatter/test/suite/ComboFormatterIssueSpecTest.java
@@ -47,10 +47,7 @@
 import org.jetbrains.annotations.Nullable;
 import org.junit.runners.Parameterized;
 
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 
 public class ComboFormatterIssueSpecTest extends FormatterSpecTest {
     final private static String SPEC_RESOURCE = "/formatter_issue_test_suite_spec.md";
@@ -94,6 +91,7 @@ public class ComboFormatterIssueSpecTest extends FormatterSpecTest {
         optionsMap.put("use-builder", new MutableDataSet().set(USE_BUILDER, true));
         optionsMap.put("spacer", new MutableDataSet().set(TocExtension.BLANK_LINE_SPACER, true));
         optionsMap.put("text-only", new MutableDataSet().set(TocExtension.IS_TEXT_ONLY, true));
+        optionsMap.put("no-anchor-links", new MutableDataSet().set(UNLOAD_EXTENSIONS, Collections.singletonList(AnchorLinkExtension.class)));
 
         optionsMap.put("no-append-references", new MutableDataSet().set(Formatter.APPEND_TRANSFERRED_REFERENCES, false)
                 .set(TestUtils.INCLUDED_DOCUMENT, "" +
diff --git a/flexmark-formatter-test-suite/src/test/resources/formatter_issue_test_suite_spec.md b/flexmark-formatter-test-suite/src/test/resources/formatter_issue_test_suite_spec.md
index 997ba7f1e..5d55b926d 100644
--- a/flexmark-formatter-test-suite/src/test/resources/formatter_issue_test_suite_spec.md
+++ b/flexmark-formatter-test-suite/src/test/resources/formatter_issue_test_suite_spec.md
@@ -376,3 +376,45 @@ Text wrapping pipe `|` should be escaped when
 ````````````````````````````````
 
 
+### xxx-06
+
+Make sure `&nbsp;` is not left in heading reference links
+
+```````````````````````````````` example(Issue - xxx-06: 1) options(margin[46], no-anchor-links)
+## 2.0. References [There is a {} reference showing but is not copy-able]
+[There is a {} reference showing but is not copy-able]: https://www.example.com/0
+.
+## 2.0. References [There is a {} reference showing but is not copy-able]
+
+[There is a {} reference showing but is not copy-able]: https://www.example.com/0
+
+.
+Document[0, 155]
+  Heading[0, 73] textOpen:[0, 2, "##"] text:[3, 73, "2.0. References [There is a {} reference showing but is not copy-able]"]
+    Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+    LinkRef[19, 73] referenceOpen:[19, 20, "["] reference:[20, 72, "There is a {} reference showing but is not copy-able"] referenceClose:[72, 73, "]"]
+      Text[20, 72] chars:[20, 72, "There … -able"]
+  Reference[74, 155] refOpen:[74, 75, "["] ref:[75, 127, "There is a {} reference showing but is not copy-able"] refClose:[127, 129, "]:"] url:[130, 155, "https://www.example.com/0"]
+````````````````````````````````
+
+all is fine with anchor links
+
+```````````````````````````````` example(Issue - xxx-06: 2) options(margin[46])
+## 2.0. References [There is a {} reference showing but is not copy-able]
+[There is a {} reference showing but is not copy-able]: https://www.example.com/0
+.
+## 2.0. References [There is a {} reference showing but is not copy-able]
+
+[There is a {} reference showing but is not copy-able]: https://www.example.com/0
+
+.
+Document[0, 155]
+  Heading[0, 73] textOpen:[0, 2, "##"] text:[3, 73, "2.0. References [There is a {} reference showing but is not copy-able]"]
+    AnchorLink[3, 73]
+      Text[3, 19] chars:[3, 19, "2.0.  … nces "]
+      LinkRef[19, 73] referenceOpen:[19, 20, "["] reference:[20, 72, "There is a {} reference showing but is not copy-able"] referenceClose:[72, 73, "]"]
+        Text[20, 72] chars:[20, 72, "There … -able"]
+  Reference[74, 155] refOpen:[74, 75, "["] ref:[75, 127, "There is a {} reference showing but is not copy-able"] refClose:[127, 129, "]:"] url:[130, 155, "https://www.example.com/0"]
+````````````````````````````````
+
+
diff --git a/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/DelimitedNode.java b/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/DelimitedNode.java
index 374c0f065..9cc4bad4c 100644
--- a/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/DelimitedNode.java
+++ b/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/DelimitedNode.java
@@ -21,7 +21,7 @@ public interface DelimitedNode extends TextContainer {
     void setClosingMarker(BasedSequence closingMarker);
 
     @Override
-    default boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    default boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         if (any(flags, F_NODE_TEXT)) {
             out.append(getText());
             return false;
diff --git a/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextCollectingVisitor.java b/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextCollectingVisitor.java
index 3a990d81d..bff298aca 100644
--- a/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextCollectingVisitor.java
+++ b/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextCollectingVisitor.java
@@ -8,7 +8,7 @@
 public class TextCollectingVisitor {
     final private NodeVisitor myVisitor;
     SpaceInsertingSequenceBuilder out;
-    int flags;
+    int flags;  // flags defined by TextContainer
 
     public TextCollectingVisitor() {
         myVisitor = new NodeVisitor() {
@@ -17,7 +17,7 @@ public void processNode(@NotNull Node node, boolean withChildren, @NotNull BiCon
                 if (!node.isOrDescendantOfType(DoNotCollectText.class)) {
                     if (node instanceof TextContainer) {
                         out.setLastNode(node);
-                        if (((TextContainer) node).collectText(out, flags)) {
+                        if (((TextContainer) node).collectText(out, flags, myVisitor)) {
                             if (node instanceof BlankLineBreakNode && out.isNotEmpty()) {
                                 out.appendEol();
                             }
diff --git a/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextContainer.java b/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextContainer.java
index fbf8c5cec..fc19f385e 100644
--- a/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextContainer.java
+++ b/flexmark-util-ast/src/main/java/com/vladsch/flexmark/util/ast/TextContainer.java
@@ -9,6 +9,9 @@ public interface TextContainer {
     enum Flags implements BitField {
         LINK_TEXT_TYPE(3),
         NODE_TEXT,  // not unescaped and not percent decoded
+        FOR_HEADING_ID,  // text for heading ID
+        NO_TRIM_REF_TEXT_START,  // don't trim ref text start
+        NO_TRIM_REF_TEXT_END,  // don't trim ref text end
         ;
 
         final int bits;
@@ -28,20 +31,24 @@ public int getBits() {
     }
 
     int F_LINK_TEXT_TYPE = BitFieldSet.intMask(Flags.LINK_TEXT_TYPE);
-    int F_LINK_TEXT = 0;
-    int F_LINK_PAGE_REF = 1;
-    int F_LINK_ANCHOR = 2;
-    int F_LINK_URL = 3;
-    int F_LINK_NODE_TEXT = 4;
+    int F_LINK_TEXT = 0;         // use link text
+    int F_LINK_PAGE_REF = 1;     // use page ref
+    int F_LINK_ANCHOR = 2;       // use link anchor
+    int F_LINK_URL = 3;          // use link URL
+    int F_LINK_NODE_TEXT = 4;    // use node text
 
     int F_NODE_TEXT = BitFieldSet.intMask(Flags.NODE_TEXT);
+    int F_FOR_HEADING_ID = BitFieldSet.intMask(Flags.FOR_HEADING_ID);
+    int F_NO_TRIM_REF_TEXT_START = BitFieldSet.intMask(Flags.NO_TRIM_REF_TEXT_START);
+    int F_NO_TRIM_REF_TEXT_END = BitFieldSet.intMask(Flags.NO_TRIM_REF_TEXT_END);
 
     /**
      * Append node's text
      *
      * @param out   sequence build to which to append text
      * @param flags collection flags
+     * @param nodeVisitor node visitor to use to visit children
      * @return true if child nodes should be visited
      */
-    boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags);
+    boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor);
 }
diff --git a/flexmark-util-data/src/main/java/com/vladsch/flexmark/util/data/SharedDataKeys.java b/flexmark-util-data/src/main/java/com/vladsch/flexmark/util/data/SharedDataKeys.java
index cbd8e5c5f..004f884ad 100644
--- a/flexmark-util-data/src/main/java/com/vladsch/flexmark/util/data/SharedDataKeys.java
+++ b/flexmark-util-data/src/main/java/com/vladsch/flexmark/util/data/SharedDataKeys.java
@@ -30,6 +30,9 @@ public class SharedDataKeys {
     final public static DataKey<String> HEADER_ID_GENERATOR_NON_DASH_CHARS = new DataKey<>("HEADER_ID_GENERATOR_NON_DASH_CHARS", "");
     final public static DataKey<Boolean> HEADER_ID_GENERATOR_NO_DUPED_DASHES = new DataKey<>("HEADER_ID_GENERATOR_NO_DUPED_DASHES", false);
     final public static DataKey<Boolean> HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE = new DataKey<>("HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE", true);
+    final public static DataKey<Boolean> HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES = new DataKey<>("HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES", true);
+    final public static DataKey<Boolean> HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES = new DataKey<>("HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES", true);
+    final public static DataKey<Boolean> HEADER_ID_ADD_EMOJI_SHORTCUT = new DataKey<>("HEADER_ID_ADD_EMOJI_SHORTCUT", false);
     final public static DataKey<Boolean> RENDER_HEADER_ID = new DataKey<>("RENDER_HEADER_ID", false);
     final public static DataKey<Boolean> GENERATE_HEADER_ID = new DataKey<>("GENERATE_HEADER_ID", true);
     final public static DataKey<Boolean> DO_NOT_RENDER_LINKS = new DataKey<>("DO_NOT_RENDER_LINKS", false);
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/Code.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/Code.java
index c88b6854f..8f367c6aa 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/Code.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/Code.java
@@ -1,6 +1,7 @@
 package com.vladsch.flexmark.ast;
 
 import com.vladsch.flexmark.util.ast.DoNotLinkDecorate;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.builder.ISequenceBuilder;
 import org.jetbrains.annotations.NotNull;
@@ -23,7 +24,7 @@ public void getAstExtra(@NotNull StringBuilder out) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         out.append(getText());
         return false;
     }
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/HardLineBreak.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/HardLineBreak.java
index 9d410fc94..b3d4dfa7b 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/HardLineBreak.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/HardLineBreak.java
@@ -2,6 +2,7 @@
 
 import com.vladsch.flexmark.util.ast.DoNotTrim;
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.builder.ISequenceBuilder;
@@ -22,7 +23,7 @@ public HardLineBreak(BasedSequence chars) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         BasedSequence chars = getChars();
         out.add(chars.subSequence(chars.length() - 1, chars.length()));
         return false;
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/Heading.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/Heading.java
index dc97b5e4f..fcec361ba 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/Heading.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/Heading.java
@@ -1,8 +1,10 @@
 package com.vladsch.flexmark.ast;
 
+import com.vladsch.flexmark.html.HtmlRenderer;
 import com.vladsch.flexmark.util.ast.Block;
 import com.vladsch.flexmark.util.ast.BlockContent;
 import com.vladsch.flexmark.util.ast.TextCollectingVisitor;
+import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import org.jetbrains.annotations.NotNull;
 
@@ -29,7 +31,10 @@ public BasedSequence[] getSegments() {
 
     @Override
     public String getAnchorRefText() {
-        return new TextCollectingVisitor().collectAndGetText(this).trim();
+        boolean trimLeadingSpaces = HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES.get(getDocument());
+        boolean trimTrailingSpaces = HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES.get(getDocument());
+
+        return new TextCollectingVisitor().collectAndGetText(this, TextContainer.F_FOR_HEADING_ID + (trimLeadingSpaces ? 0 : TextContainer.F_NO_TRIM_REF_TEXT_START) + (trimTrailingSpaces ? 0 : TextContainer.F_NO_TRIM_REF_TEXT_END));
     }
 
     @Override
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/HtmlEntity.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/HtmlEntity.java
index 45b53d68f..11c3ed392 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/HtmlEntity.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/HtmlEntity.java
@@ -1,6 +1,7 @@
 package com.vladsch.flexmark.ast;
 
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.Escaping;
@@ -36,7 +37,7 @@ public HtmlEntity(BasedSequence chars) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         if (any(flags, F_NODE_TEXT)) {
             out.append(getChars());
         } else {
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/LinkNode.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/LinkNode.java
index 631fe83ed..09cd8e263 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/LinkNode.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/LinkNode.java
@@ -1,6 +1,7 @@
 package com.vladsch.flexmark.ast;
 
 import com.vladsch.flexmark.util.ast.DoNotLinkDecorate;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.Escaping;
@@ -17,7 +18,7 @@ public LinkNode(BasedSequence chars) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         int urlType = flags & F_LINK_TEXT_TYPE;
 
         BasedSequence url;
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/Paragraph.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/Paragraph.java
index a6f6b4e55..d828bac0e 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/Paragraph.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/Paragraph.java
@@ -2,6 +2,7 @@
 
 import com.vladsch.flexmark.util.ast.Block;
 import com.vladsch.flexmark.util.ast.BlockContent;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.builder.ISequenceBuilder;
@@ -133,7 +134,7 @@ public boolean hasTableSeparator() {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         if (!out.isEmpty()) {
             out.add("\n\n");
         }
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/RefNode.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/RefNode.java
index 241fd7f8d..9c22a947d 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/RefNode.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/RefNode.java
@@ -3,6 +3,7 @@
 import com.vladsch.flexmark.ast.util.ReferenceRepository;
 import com.vladsch.flexmark.parser.Parser;
 import com.vladsch.flexmark.util.ast.*;
+import com.vladsch.flexmark.util.misc.BitFieldSet;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.Escaping;
 import com.vladsch.flexmark.util.sequence.ReplacedTextMapper;
@@ -210,11 +211,24 @@ public void setReferenceClosingMarker(BasedSequence referenceClosingMarker) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
+        // images no longer add alt text
+        
         int urlType = flags & F_LINK_TEXT_TYPE;
 
         if (urlType == F_LINK_TEXT) {
-            return true;
+            // To allow using leading/trailing spaces for generating heading ids, need to include stripped out spaces 
+            if (BitFieldSet.any(flags, F_FOR_HEADING_ID) && this instanceof ImageRef) return false;
+            
+            if (BitFieldSet.any(flags, F_FOR_HEADING_ID) && BitFieldSet.any(flags, F_NO_TRIM_REF_TEXT_START | F_NO_TRIM_REF_TEXT_END)) {
+                BasedSequence[] segments = getSegments();
+                if (BitFieldSet.any(flags, F_NO_TRIM_REF_TEXT_START)) out.append(getChars().baseSubSequence(segments[0].getEndOffset(), segments[1].getStartOffset()));
+                nodeVisitor.visitChildren(this);
+                if (BitFieldSet.any(flags, F_NO_TRIM_REF_TEXT_END)) out.append(getChars().baseSubSequence(segments[1].getEndOffset(), segments[2].getStartOffset()));
+                return false;
+            } else {
+                return true;
+            }
         } else {
             Reference reference = getReferenceNode(getDocument());
             if (urlType == F_LINK_NODE_TEXT) {
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/SoftLineBreak.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/SoftLineBreak.java
index 079ae08c4..dcfab2013 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/SoftLineBreak.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/SoftLineBreak.java
@@ -1,9 +1,6 @@
 package com.vladsch.flexmark.ast;
 
-import com.vladsch.flexmark.util.ast.DoNotAttributeDecorate;
-import com.vladsch.flexmark.util.ast.DoNotTrim;
-import com.vladsch.flexmark.util.ast.Node;
-import com.vladsch.flexmark.util.ast.TextContainer;
+import com.vladsch.flexmark.util.ast.*;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.builder.ISequenceBuilder;
 import org.jetbrains.annotations.NotNull;
@@ -47,7 +44,7 @@ public void setCharsFromSegments() {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         out.add(getChars());
         return false;
     }
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/Text.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/Text.java
index 583fa1bc6..bf3efff72 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/Text.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/Text.java
@@ -1,6 +1,7 @@
 package com.vladsch.flexmark.ast;
 
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.Escaping;
@@ -34,7 +35,7 @@ public BasedSequence[] getSegments() {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         if (any(flags, F_NODE_TEXT)) {
             out.append(getChars());
         } else {
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/ast/TextBase.java b/flexmark/src/main/java/com/vladsch/flexmark/ast/TextBase.java
index 7d802c2c5..99616ba98 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/ast/TextBase.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/ast/TextBase.java
@@ -1,6 +1,7 @@
 package com.vladsch.flexmark.ast;
 
 import com.vladsch.flexmark.util.ast.Node;
+import com.vladsch.flexmark.util.ast.NodeVisitor;
 import com.vladsch.flexmark.util.ast.TextContainer;
 import com.vladsch.flexmark.util.sequence.BasedSequence;
 import com.vladsch.flexmark.util.sequence.Escaping;
@@ -34,7 +35,7 @@ public void getAstExtra(@NotNull StringBuilder out) {
     }
 
     @Override
-    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags) {
+    public boolean collectText(ISequenceBuilder<? extends ISequenceBuilder<?, BasedSequence>, BasedSequence> out, int flags, NodeVisitor nodeVisitor) {
         if (any(flags, F_NODE_TEXT)) {
             out.append(getChars());
         } else {
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/formatter/internal/CoreNodeFormatter.java b/flexmark/src/main/java/com/vladsch/flexmark/formatter/internal/CoreNodeFormatter.java
index e409c94c6..4c56e9aa2 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/formatter/internal/CoreNodeFormatter.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/formatter/internal/CoreNodeFormatter.java
@@ -910,13 +910,13 @@ private void render(Image node, NodeFormatterContext context, MarkdownWriter mar
             if (!node.getUrlContent().isEmpty()) {
                 markdown.openPreFormatted(true);
                 markdown.pushOptions().preserveSpaces();
-                
+
                 if (!context.isTransformingText() && formatterOptions.rightMargin > 0) {
                     CharSequence chars = node.getUrlContent();
                     int iMax = chars.length();
                     boolean hadEOL = true;
                     markdown.append('\n');
-                    
+
                     for (int i = 0; i < iMax; i++) {
                         char c = chars.charAt(i);
 
@@ -1056,7 +1056,11 @@ private void render(ImageRef node, NodeFormatterContext context, MarkdownWriter
             } else {
                 if (node.isReferenceTextCombined()) {
                     markdown.append(node.getReferenceOpeningMarker());
-                    markdown.append(node.getReference().toMapped(SpaceMapper.toNonBreakSpace));
+                    if (node.isOrDescendantOfType(Paragraph.class)) {
+                        markdown.append(node.getReference().toMapped(SpaceMapper.toNonBreakSpace));
+                    } else {
+                        markdown.append(node.getReference());
+                    }
                     markdown.append(node.getReferenceClosingMarker());
 
                     markdown.append(node.getTextOpeningMarker());
@@ -1104,7 +1108,11 @@ private void render(LinkRef node, NodeFormatterContext context, MarkdownWriter m
             } else {
                 if (node.isReferenceTextCombined()) {
                     markdown.append(node.getReferenceOpeningMarker());
-                    markdown.append(node.getReference().toMapped(SpaceMapper.toNonBreakSpace));
+                    if (node.isOrDescendantOfType(Paragraph.class)) {
+                        markdown.append(node.getReference().toMapped(SpaceMapper.toNonBreakSpace));
+                    } else {
+                        markdown.append(node.getReference());
+                    }
                     markdown.append(node.getReferenceClosingMarker());
 
                     markdown.append(node.getTextOpeningMarker());
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/html/HtmlRenderer.java b/flexmark/src/main/java/com/vladsch/flexmark/html/HtmlRenderer.java
index 084b34001..a8be6a443 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/html/HtmlRenderer.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/html/HtmlRenderer.java
@@ -61,6 +61,9 @@ public class HtmlRenderer implements IRender {
     final public static DataKey<String> HEADER_ID_GENERATOR_NON_DASH_CHARS = SharedDataKeys.HEADER_ID_GENERATOR_NON_DASH_CHARS;
     final public static DataKey<Boolean> HEADER_ID_GENERATOR_NO_DUPED_DASHES = SharedDataKeys.HEADER_ID_GENERATOR_NO_DUPED_DASHES;
     final public static DataKey<Boolean> HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE = SharedDataKeys.HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE;
+    final public static DataKey<Boolean> HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES = SharedDataKeys.HEADER_ID_REF_TEXT_TRIM_LEADING_SPACES;
+    final public static DataKey<Boolean> HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES = SharedDataKeys.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES;
+    final public static DataKey<Boolean> HEADER_ID_ADD_EMOJI_SHORTCUT = SharedDataKeys.HEADER_ID_ADD_EMOJI_SHORTCUT;
     final public static DataKey<Boolean> RENDER_HEADER_ID = SharedDataKeys.RENDER_HEADER_ID;
     final public static DataKey<Boolean> GENERATE_HEADER_ID = SharedDataKeys.GENERATE_HEADER_ID;
     final public static DataKey<Boolean> DO_NOT_RENDER_LINKS = SharedDataKeys.DO_NOT_RENDER_LINKS;
diff --git a/flexmark/src/main/java/com/vladsch/flexmark/parser/ParserEmulationProfile.java b/flexmark/src/main/java/com/vladsch/flexmark/parser/ParserEmulationProfile.java
index be21c5c07..502762045 100644
--- a/flexmark/src/main/java/com/vladsch/flexmark/parser/ParserEmulationProfile.java
+++ b/flexmark/src/main/java/com/vladsch/flexmark/parser/ParserEmulationProfile.java
@@ -381,6 +381,11 @@ public MutableDataHolder setIn(@NotNull MutableDataHolder dataHolder) {
                     .set(HtmlRenderer.HEADER_ID_GENERATOR_TO_DASH_CHARS, " -")
                     .set(HtmlRenderer.HEADER_ID_GENERATOR_NON_DASH_CHARS, "_")
                     .set(HtmlRenderer.HEADER_ID_GENERATOR_NON_ASCII_TO_LOWERCASE, false)
+                    
+                    // GitHub does not trim trailing spaces of Ref Links in Headings for ID generation
+                    .set(HtmlRenderer.HEADER_ID_REF_TEXT_TRIM_TRAILING_SPACES, false)
+                    // GitHub adds emoji shortcut text to heading id
+                    .set(HtmlRenderer.HEADER_ID_ADD_EMOJI_SHORTCUT, true)
             ;
         } else if (this == MULTI_MARKDOWN) {
             getOptions(dataHolder).setIn(dataHolder);