Fix case where doc_markdown is triggered on words ending with "ified"

clippy_lints/src/doc/markdown.rs

@@ -92,6 +92,10 @@ fn check_word(cx: &LateContext<'_>, word: &str, span: Span, code_level: isize, b
             && matches!(prefix.chars().last(), Some('S' | 'X'))
         {
             prefix
+        } else if let Some(prefix) = s.strip_suffix("ified")
+            && prefix.chars().all(|c| c.is_ascii_uppercase())
+        {
+            prefix
         } else {
             s.strip_suffix('s').unwrap_or(s)
         };

tests/ui/doc/doc_markdown-issue_13097.fixed

@@ -0,0 +1,13 @@
+// This test checks that words starting with capital letters and ending with "ified" don't
+// trigger the lint.
+
+#![deny(clippy::doc_markdown)]
+
+pub enum OutputFormat {
+    /// `HumaNified`
+    //~^ ERROR: item in documentation is missing backticks
+    Plain,
+    // Should not warn!
+    /// JSONified console output
+    Json,
+}

tests/ui/doc/doc_markdown-issue_13097.rs

@@ -0,0 +1,13 @@
+// This test checks that words starting with capital letters and ending with "ified" don't
+// trigger the lint.
+
+#![deny(clippy::doc_markdown)]
+
+pub enum OutputFormat {
+    /// HumaNified
+    //~^ ERROR: item in documentation is missing backticks
+    Plain,
+    // Should not warn!
+    /// JSONified console output
+    Json,
+}

tests/ui/doc/doc_markdown-issue_13097.stderr

@@ -0,0 +1,18 @@
+error: item in documentation is missing backticks
+  --> tests/ui/doc/doc_markdown-issue_13097.rs:7:9
+   |
+LL |     /// HumaNified
+   |         ^^^^^^^^^^
+   |
+note: the lint level is defined here
+  --> tests/ui/doc/doc_markdown-issue_13097.rs:4:9
+   |
+LL | #![deny(clippy::doc_markdown)]
+   |         ^^^^^^^^^^^^^^^^^^^^
+help: try
+   |
+LL |     /// `HumaNified`
+   |         ~~~~~~~~~~~~
+
+error: aborting due to 1 previous error
+