Capitalization only needed first word is character (#49130)

Author: Peter Bengtsson

src/content-linter/lib/linting-rules/list-first-word-capitalization.js

@@ -32,9 +32,9 @@ export const listFirstWordCapitalization = {
       const content = token.content.trim()
       const firstWord = content.trim().split(' ')[0]
 
-      // Liquid is considered a text node but we don't want to capitalize it
-      if (firstWord.startsWith('[{%') || firstWord.startsWith('{%') || firstWord.startsWith('{{'))
-        return
+      // If the first character in the first word is not an alphanumeric,
+      // don't bother. For example `"ubunut-latest"` or `{% data ... %}`.
+      if (/^[^a-z]/i.test(firstWord)) return
       // If the first letter is capitalized, it's not an error
       // And any special characters (like @) that can't be capitalized
       if (/[A-Z@]/.test(firstWord[0])) return

src/content-linter/tests/unit/list-first-word-captitalization.js

@@ -54,6 +54,7 @@ describe(listFirstWordCapitalization.names.join(' - '), () => {
       '- @mention your friends',
       '- @hash tags',
       '- 05:00',
+      '- "keyword" starts with a quotation sign',
     ].join('\n')
     const result = await runRule(listFirstWordCapitalization, { strings: { markdown } })
     const errors = result.markdown