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doc/md026.md

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+# MD026 - Trailing punctuation in heading
+
+Tags: headers, headings
+
+Aliases: no-trailing-punctuation
+
+Parameters:
+
+* `punctuation`: Punctuation characters not allowed at end of headings (`string`, default `.,;:!。，；：！`)
+
+Fixable: Most violations can be fixed by tooling
+
+This rule is triggered on any heading that has one of the specified normal or
+full-width punctuation characters as the last character in the line:
+
+```markdown
+# This is a heading.
+```
+
+To fix this, remove the trailing punctuation:
+
+```markdown
+# This is a heading
+```
+
+Note: The `punctuation` parameter can be used to specify what characters count
+as punctuation at the end of a heading. For example, you can change it to
+`".,;:"` to allow headings that end with an exclamation point. `?` is
+allowed by default because of how common it is in headings of FAQ-style documents.
+Setting the `punctuation` parameter to `""` allows all characters - and is
+equivalent to disabling the rule.
+
+Note: The trailing semicolon of
+[HTML entity references](https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references)
+like `©`, `©`, and `©` is ignored by this rule.
+
+Rationale: Headings are not meant to be full sentences. More information:
+<https://cirosantilli.com/markdown-style-guide#punctuation-at-the-end-of-headers>