diff --git a/runtime/syntax/lua.vim b/runtime/syntax/lua.vim
index b398e2e..437a1ff 100644
--- a/runtime/syntax/lua.vim
+++ b/runtime/syntax/lua.vim
@@ -1,11 +1,11 @@
 " Vim syntax file
-" Language:	Lua 4.0, Lua 5.0, Lua 5.1 and Lua 5.2
-" Maintainer:	Marcus Aurelius Farias <masserahguard-lua 'at' yahoo com>
-" First Author:	Carlos Augusto Teixeira Mendes <cmendes 'at' inf puc-rio br>
-" Last Change:	2022 Mar 31
-" Options:	lua_version = 4 or 5
-"		lua_subversion = 0 (4.0, 5.0) or 1 (5.1) or 2 (5.2)
-"		default 5.2
+" Language:     Lua 4.0, Lua 5.0, Lua 5.1 and Lua 5.2
+" Maintainer:   Marcus Aurelius Farias <masserahguard-lua 'at' yahoo com>
+" First Author: Carlos Augusto Teixeira Mendes <cmendes 'at' inf puc-rio br>
+" Last Change:  2022 Mar 31
+" Options:      lua_version = 4 or 5
+"               lua_subversion = 0 (4.0, 5.0) or 1 (5.1) or 2 (5.2)
+"               default 5.2
 
 " quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -33,11 +33,11 @@
 syn keyword luaTodo            contained TODO FIXME XXX
 syn match   luaComment         "--.*$" contains=luaTodo,@Spell
 if lua_version == 5 && lua_subversion == 0
-  syn region luaComment        matchgroup=luaComment start="--\[\[" end="\]\]" contains=luaTodo,luaInnerComment,@Spell
+  syn region luaComment        matchgroup=luaCommentDelimiter start="--\[\[" end="\]\]" contains=luaTodo,luaInnerComment,@Spell
   syn region luaInnerComment   contained transparent start="\[\[" end="\]\]"
 elseif lua_version > 5 || (lua_version == 5 && lua_subversion >= 1)
   " Comments in Lua 5.1: --[[ ... ]], [=[ ... ]=], [===[ ... ]===], etc.
-  syn region luaComment        matchgroup=luaComment start="--\[\z(=*\)\[" end="\]\z1\]" contains=luaTodo,@Spell
+  syn region luaComment        matchgroup=luaCommentDelimiter start="--\[\z(=*\)\[" end="\]\z1\]" contains=luaTodo,@Spell
 endif
 
 " First line may start with #!
@@ -99,18 +99,18 @@
 elseif lua_version == 5
   if lua_subversion == 0
     syn match  luaSpecial contained #\\[\\abfnrtv'"[\]]\|\\[[:digit:]]\{,3}#
-    syn region luaString2 matchgroup=luaString start=+\[\[+ end=+\]\]+ contains=luaString2,@Spell
+    syn region luaString2 matchgroup=luaStringDelimiter start=+\[\[+ end=+\]\]+ contains=luaString2,@Spell
   else
     if lua_subversion == 1
       syn match  luaSpecial contained #\\[\\abfnrtv'"]\|\\[[:digit:]]\{,3}#
     else " Lua 5.2
       syn match  luaSpecial contained #\\[\\abfnrtvz'"]\|\\x[[:xdigit:]]\{2}\|\\[[:digit:]]\{,3}#
     endif
-    syn region luaString2 matchgroup=luaString start="\[\z(=*\)\[" end="\]\z1\]" contains=@Spell
+    syn region luaString2 matchgroup=luaStringDelimiter start="\[\z(=*\)\[" end="\]\z1\]" contains=@Spell
   endif
 endif
-syn region luaString  start=+'+ end=+'+ skip=+\\\\\|\\'+ contains=luaSpecial,@Spell
-syn region luaString  start=+"+ end=+"+ skip=+\\\\\|\\"+ contains=luaSpecial,@Spell
+syn region luaString matchgroup=luaStringDelimiter start=+'+ end=+'+ skip=+\\\\\|\\'+ contains=luaSpecial,@Spell
+syn region luaString matchgroup=luaStringDelimiter start=+"+ end=+"+ skip=+\\\\\|\\"+ contains=luaSpecial,@Spell
 
 " integer number
 syn match luaNumber "\<\d\+\>"
@@ -333,27 +333,29 @@
 " Define the default highlighting.
 " Only when an item doesn't have highlighting yet
 
-hi def link luaStatement		Statement
-hi def link luaRepeat		Repeat
-hi def link luaFor			Repeat
-hi def link luaString		String
-hi def link luaString2		String
-hi def link luaNumber		Number
-hi def link luaOperator		Operator
-hi def link luaIn			Operator
-hi def link luaConstant		Constant
-hi def link luaCond		Conditional
-hi def link luaElse		Conditional
-hi def link luaFunction		Function
-hi def link luaComment		Comment
-hi def link luaTodo		Todo
-hi def link luaTable		Structure
-hi def link luaError		Error
-hi def link luaParenError		Error
-hi def link luaBraceError		Error
-hi def link luaSpecial		SpecialChar
-hi def link luaFunc		Identifier
-hi def link luaLabel		Label
+hi def link luaStatement        Statement
+hi def link luaRepeat           Repeat
+hi def link luaFor              Repeat
+hi def link luaString           String
+hi def link luaString2          String
+hi def link luaStringDelimiter  luaString
+hi def link luaNumber           Number
+hi def link luaOperator         Operator
+hi def link luaIn               Operator
+hi def link luaConstant         Constant
+hi def link luaCond             Conditional
+hi def link luaElse             Conditional
+hi def link luaFunction         Function
+hi def link luaComment          Comment
+hi def link luaCommentDelimiter luaComment
+hi def link luaTodo             Todo
+hi def link luaTable            Structure
+hi def link luaError            Error
+hi def link luaParenError       Error
+hi def link luaBraceError       Error
+hi def link luaSpecial          SpecialChar
+hi def link luaFunc             Identifier
+hi def link luaLabel            Label
 
 
 let b:current_syntax = "lua"