Update runtime files

runtime/syntax/cabalconfig.vim

@@ -0,0 +1,30 @@
+" Vim syntax file
+" Language:		Cabal Config
+" Maintainer:		profunctor@pm.me
+" Last Change:		Marcin Szamotulski
+" Original Author:	Marcin Szamotulski
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn match CabalConfigSection /^\S[[:alpha:]]\+\%(-[[:alpha:]]\+\)*[^:]*$/
+syn region CabalConfigRegion matchgroup=CabalConfigKey start=/^\s*[[:alpha:]]\+\%(-[[:alpha:]]\+\)*:/ matchgroup=NONE end=/$/ contains=CabalConfigSeparator,CabalConfigKeyword,CabalConfigPath keepend
+syn match CabalConfigComment /^\s*--.*$/
+syn match CabalConfigValue /.*$/ contained
+syn match CabalConfigKey /[[:alpha:]]\+\%(-[[:alpha:]]\+\)*\ze:/
+syn keyword CabalConfigSeparator : contained
+syn match CabalConfigVariable /\$[[:alpha:]]\+/
+syn keyword CabalConfigKeyword True False ghc
+syn match CabalConfigPath /\%([[:alpha:]]\+:\)\?\%(\/[[:print:]]\+\)\+/
+
+hi def link CabalConfigComment Comment
+hi def link CabalConfigSection Title
+hi def link CabalConfigKey Statement
+hi def link CabalConfigSeparator NonText
+hi def link CabalConfigValue Normal
+hi def link CabalConfigVariable Identifier
+hi def link CabalConfigKeyword Keyword
+hi def link CabalConfigPath Directory
+
+let b:current_syntax = "cabal.config"