tools: Import the latest syntax/help.vim

Author: k-takata

tools/syntax/help.vim

@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	Vim help file
 " Maintainer:	Bram Moolenaar ([email protected])
-" Last Change:	2016 Sep 02
+" Last Change:	2019 May 12
 
 " Quit when a (custom) syntax file was already loaded
 if exists("b:current_syntax")
@@ -11,7 +11,7 @@ endif
 let s:cpo_save = &cpo
 set cpo&vim
 
-syn match helpHeadline		"^[-A-Z .][-A-Z0-9 .()]*[ \t]\+\*"me=e-1
+syn match helpHeadline		"^[-A-Z .][-A-Z0-9 .()_]*[ \t]\+\*"me=e-1
 syn match helpSectionDelim	"^===.*===$"
 syn match helpSectionDelim	"^---.*--$"
 if has("conceal")
@@ -54,11 +54,13 @@ else
   syn match helpIgnore		"." contained
 endif
 syn keyword helpNote		note Note NOTE note: Note: NOTE: Notes Notes:
-syn keyword helpWarning		WARNING: Warning:
+syn keyword helpWarning		WARNING WARNING: Warning:
+syn keyword helpDeprecated	DEPRECATED DEPRECATED: Deprecated:
 syn match helpSpecial		"\<N\>"
 syn match helpSpecial		"\<N\.$"me=e-1
 syn match helpSpecial		"\<N\.\s"me=e-2
 syn match helpSpecial		"(N\>"ms=s+1
+
 syn match helpSpecial		"\[N]"
 " avoid highlighting N  N in help.txt
 syn match helpSpecial		"N  N"he=s+1
@@ -84,6 +86,9 @@ syn match helpSpecial		"\[arguments]"
 syn match helpSpecial		"\[ident]"
 syn match helpSpecial		"\[addr]"
 syn match helpSpecial		"\[group]"
+" Don't highlight [converted] and others that do not have a tag
+syn match helpNormal		"\[\(readonly\|fifo\|socket\|converted\|crypted\)]"
+
 syn match helpSpecial		"CTRL-."
 syn match helpSpecial		"CTRL-Break"
 syn match helpSpecial		"CTRL-PageUp"
@@ -171,6 +176,7 @@ hi def link helpNotVi		Special
 hi def link helpSpecial		Special
 hi def link helpNote		Todo
 hi def link helpWarning		Todo
+hi def link helpDeprecated	Todo
 
 hi def link helpComment		Comment
 hi def link helpConstant	Constant