Merge pull request #1133 from tsuyoshicho/syntax/20220828/supportheadline

feat: Add ja special helpHeadline region

Author: h-east

syntax/help_ja.vim

@@ -8,3 +8,8 @@ syn region helpTransNote start="{訳注:" end="}" contains=helpLeadBlank,helpHyp
 syn region helpBracesInTransNote start=".{"ms=e end="}."me=s transparent contained contains=helpLeadBlank,helpHyperTextJump,helpBracesInTransNote
 syn match helpSpecial "[。、]\zs\[[-a-z^A-Z0-9_]\{2,}]"
 hi def link helpTransNote Special
+if has("conceal")
+  syn region helpHeadline matchgroup=helpIgnore start="^☆\(\s\)\@!" end="\ze\(\s\+\*\|$\)" keepend concealends
+else
+  syn region helpHeadline matchgroup=helpIgnore start="^☆\(\s\)\@!" end="\ze\(\s\+\*\|$\)" keepend
+endif