Updated runtime files.
diff --git a/runtime/syntax/help.vim b/runtime/syntax/help.vim
index adbd2a7..68e0a1a 100644
--- a/runtime/syntax/help.vim
+++ b/runtime/syntax/help.vim
@@ -1,7 +1,7 @@
" Vim syntax file
" Language: Vim help file
" Maintainer: Bram Moolenaar (Bram@vim.org)
-" Last Change: 2012 Jul 16
+" Last Change: 2013 Apr 07
" Quit when a (custom) syntax file was already loaded
if exists("b:current_syntax")
@@ -40,7 +40,7 @@
syn match helpVim "VIM REFERENCE.*"
syn match helpOption "'[a-z]\{2,\}'"
syn match helpOption "'t_..'"
-syn match helpCommand "`[^` ]*`"hs=s+1,he=e-1 contains=helpBacktick
+syn match helpCommand "`[^` ]\+`"hs=s+1,he=e-1 contains=helpBacktick
syn match helpHeader "\s*\zs.\{-}\ze\s\=\~$" nextgroup=helpIgnore
syn match helpGraphic ".* \ze`$" nextgroup=helpIgnore
if has("conceal")