Updated runtime files.
diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index 1497499..355e8eb 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -2,8 +2,8 @@
" Language: shell (sh) Korn shell (ksh) bash (sh)
" Maintainer: Dr. Charles E. Campbell, Jr. <NdrOchipS@PcampbellAfamily.Mbiz>
" Previous Maintainer: Lennart Schultz <Lennart.Schultz@ecmwf.int>
-" Last Change: Dec 09, 2011
-" Version: 121
+" Last Change: Mar 19, 2012
+" Version: 122
" URL: http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
" For options and settings, please use: :help ft-sh-syntax
" This file includes many ideas from ?ric Brunet (eric.brunet@ens.fr)
@@ -263,6 +263,7 @@
if exists("b:is_kornshell") || exists("b:is_bash")
syn region shCommandSub matchgroup=shCmdSubRegion start="\$(" skip='\\\\\|\\.' end=")" contains=@shCommandSubList
syn region shArithmetic matchgroup=shArithRegion start="\$((" skip='\\\\\|\\.' end="))" contains=@shArithList
+ syn region shArithmetic matchgroup=shArithRegion start="\$\[" skip='\\\\\|\\.' end="\]" contains=@shArithList
syn match shSkipInitWS contained "^\s\+"
elseif !exists("g:sh_no_error")
syn region shCommandSub matchgroup=Error start="\$(" end=")" contains=@shCommandSubList