remove invalid flag for ack

Author: bling

bundle/neobundle.vim

@@ -146,6 +146,7 @@
   set autoread                                        "auto reload if file saved externally
   set fileformats+=mac                                "add mac to auto-detection of file format line endings
   set nrformats-=octal                                "always assume decimal numbers
+  set autochdir
   set showcmd
   set tags=tags;/
   set showfulltag
@@ -550,7 +551,7 @@
         let g:unite_source_grep_recursive_opt=''
       elseif executable('ack')
         let g:unite_source_grep_command='ack'
-        let g:unite_source_grep_default_opts='--no-heading --no-color -a -C4'
+        let g:unite_source_grep_default_opts='--no-heading --no-color -C4'
         let g:unite_source_grep_recursive_opt=''
       endif