Avoid autocmd side-effects when jumping to/from preview window.

airblade · airblade · commit e113f07d0b1c · 2016-10-18T10:12:30.000+01:00
Fixes airblade#379.
diff --git a/autoload/gitgutter.vim b/autoload/gitgutter.vim
@@ -236,15 +236,15 @@ function! gitgutter#preview_hunk() abort
 
       silent! wincmd P
       if !&previewwindow
-        execute 'bo ' . &previewheight . ' new'
+        noautocmd execute 'bo ' . &previewheight . ' new'
         set previewwindow
       endif
 
       setlocal noro modifiable filetype=diff buftype=nofile bufhidden=delete noswapfile
       execute "%delete_"
       call append(0, split(diff_for_hunk, "\n"))
 
-      wincmd p
+      noautocmd wincmd p
     endif
   endif
   call gitgutter#utility#restore_shell()
