Merge pull request #611 from cespare/template-syntax-fix-1

Fix template variable highlighting

Author: fatih

syntax/gotexttmpl.vim

@@ -65,7 +65,7 @@ hi def link     goImaginary  Number
 syn cluster     gotplLiteral     contains=goString,goRawString,goCharacter,@goInt,goFloat,goImaginary
 syn keyword     gotplControl     contained   if else end range with template
 syn keyword     gotplFunctions   contained   and html index js len not or print printf println urlquery eq ne lt le gt ge
-syn match       gotplVariable    contained   /\$[^ ]*\>/
+syn match       gotplVariable    contained   /\$[a-zA-Z0-9_]*\>/
 syn match       goTplIdentifier  contained   /\.[^\s}]*\>/
 
 hi def link     gotplControl        Keyword