Update runtime files.
diff --git a/runtime/syntax/config.vim b/runtime/syntax/config.vim
index c6d4e6b..3636ed4 100644
--- a/runtime/syntax/config.vim
+++ b/runtime/syntax/config.vim
@@ -1,9 +1,10 @@
" Vim syntax file
" Language: configure.in script: M4 with sh
-" Maintainer: Christian Hammesr <ch@lathspell.westend.com>
-" Last Change: 2015 Jan 14
+" Former Maintainer: Christian Hammesr <ch@lathspell.westend.com>
+" Last Change: 2018 Feb 03
" (patch from Yngve Inntjore Levinsen to detect AC_MSG)
" (patch from Khym Chanur to add @Spell)
+" (patch from James McCoy to fix paren matching)
" Well, I actually even do not know much about m4. This explains why there
" is probably very much missing here, yet !
@@ -30,8 +31,8 @@
syn region configstring start=+\z(["'`]\)+ skip=+\\\z1+ end=+\z1+ contains=@Spell
" Anything inside AC_MSG_TYPE([...]) and AC_MSG_TYPE(...) is a string.
-syn region configstring matchgroup=configfunction start="AC_MSG_[A-Z]*\ze(\[" matchgroup=configdelimiter end="\])" contains=configdelimiter,@Spell
-syn region configstring matchgroup=configfunction start="AC_MSG_[A-Z]*\ze([^[]" matchgroup=configdelimiter end=")" contains=configdelimiter,@Spell
+syn region configmsg matchgroup=configfunction start="AC_MSG_[A-Z]*\ze(\[" matchgroup=configdelimiter end="\])" contains=configdelimiter,@Spell
+syn region configmsg matchgroup=configfunction start="AC_MSG_[A-Z]*\ze([^[]" matchgroup=configdelimiter end=")" contains=configdelimiter,@Spell
" Define the default highlighting.
" Only when an item doesn't have highlighting yet
@@ -45,6 +46,7 @@
hi def link configkeyword Keyword
hi def link configspecial Special
hi def link configstring String
+hi def link configmsg String
let b:current_syntax = "config"