Fix panic in case of a nested en-codeblock sections

internal/replace.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"golang.org/x/net/html"
+	"golang.org/x/net/html/atom"
 
 	"github.com/wormi4ok/evernote2md/encoding/enex"
 	"github.com/wormi4ok/evernote2md/encoding/markdown"
@@ -105,7 +106,7 @@ func appendMedia(node, media *html.Node) {
 func parseOne(h string, context *html.Node) *html.Node {
 	nodes, err := html.ParseFragment(strings.NewReader(h), context)
 	if err != nil {
-		panic("parseHtml: " + err.Error())
+		panic("parseOne: " + err.Error())
 	}
 	return nodes[0]
 }
@@ -132,6 +133,7 @@ func (r *Code) ReplaceTag(n *html.Node) {
 		}
 		f(n)
 		n.Data = "pre"
+		n.DataAtom = atom.Pre
 	}
 }
 

internal/testdata/evernote.html

@@ -1 +1 @@
-<p>abc <span style="background-color: rgb(255, 250, 165);-evernote-highlight:true;">highlighted text</span></p><p>Some <span style="font-style: italic">italic text</span></p><p>Some <span style="font-weight: bold">bold text</span></p></p><a href="https://petrashov.ru"></a><en-media type="image/jpeg" hash="c9e6c70ea74388346ffa16ff8edbdf58"/><en-media type="image/jpeg" hash="1sdb49hgt574388346ffa19kh3edbdf09"/><div style="box-sizing: border-box; padding: 8px; font-family: Monaco, Menlo, Consolas, &quot;Courier New&quot;, monospace; font-size: 12px; color: rgb(51, 51, 51); border-top-left-radius: 4px; border-top-right-radius: 4px; border-bottom-right-radius: 4px; border-bottom-left-radius: 4px; background-color: rgb(251, 250, 248); border: 1px solid rgba(0, 0, 0, 0.14902);-en-codeblock:true;"><div>   //This is a code block</div><div>    fmt.Println("hello world")</div></div><ul><li><div>First item</div></li><li><div><span>Second item</span></div></li><ul><li>Nested item</li></ul></ul><div><br/></div><table style="border-collapse: collapse; min-width: 100%;"><colgroup><col style="width: 130px;"/><col style="width: 130px;"/><col style="width: 130px;"/></colgroup><tbody><tr><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Header 1</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Middle column</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Last column title</div></td></tr><tr><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Short text</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Verylongunbreakabletext</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Something here</div></td></tr><tr><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Half empty row</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div><br/></div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div><br/></div></td></tr></tbody></table>
+<p>abc <span style="background-color: rgb(255, 250, 165);-evernote-highlight:true;">highlighted text</span></p><p>Some <span style="font-style: italic">italic text</span></p><p>Some <span style="font-weight: bold">bold text</span></p></p><a href="https://petrashov.ru"></a><en-media type="image/jpeg" hash="c9e6c70ea74388346ffa16ff8edbdf58"/><en-media type="image/jpeg" hash="1sdb49hgt574388346ffa19kh3edbdf09"/><div style="box-sizing: border-box; padding: 8px; font-family: Monaco, Menlo, Consolas, &quot;Courier New&quot;, monospace; font-size: 12px; color: rgb(51, 51, 51); border-top-left-radius: 4px; border-top-right-radius: 4px; border-bottom-right-radius: 4px; border-bottom-left-radius: 4px; background-color: rgb(251, 250, 248); border: 1px solid rgba(0, 0, 0, 0.14902);-en-codeblock:true;"><div>   //This is a code block</div><div>    fmt.Println("hello world")</div></div><ul><li><div>First item</div></li><li><div><span>Second item</span></div></li><ul><li>Nested item</li></ul></ul><div><br/></div><table style="border-collapse: collapse; min-width: 100%;"><colgroup><col style="width: 130px;"/><col style="width: 130px;"/><col style="width: 130px;"/></colgroup><tbody><tr><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Header 1</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Middle column</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Last column title</div></td></tr><tr><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Short text</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Verylongunbreakabletext</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Something here</div></td></tr><tr><td style="width: 130px; padding: 8px; border: 1px solid;"><div>Half empty row</div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div><br/></div></td><td style="width: 130px; padding: 8px; border: 1px solid;"><div><br/></div></td></tr></tbody></table><div style="-en-codeblock:true"><div style="-en-codeblock:true"></div></div>

internal/testdata/golden-frontmatter.md

@@ -36,3 +36,7 @@ Some **bold text**
 |--------------|-----------------------|-----------------|
 |Short text    |Verylongunbreakabletext|Something here   |
 |Half empty row|                       |                 |
+
+```
+
+```

internal/testdata/golden.md

@@ -25,3 +25,7 @@ Some **bold text**
 |--------------|-----------------------|-----------------|
 |Short text    |Verylongunbreakabletext|Something here   |
 |Half empty row|                       |                 |
+
+```
+
+```