Merge pull request #2240 from bhcleek/gui-hover-newlines

use newlines in the hover window when possible in the GUI

Author: bhcleek

autoload/go/tool.vim

@@ -122,7 +122,11 @@ endfunction
 function! s:balloon(msg)
   let l:msg = a:msg
   if has('balloon_eval')
-    let l:msg = join(a:msg)
+    if has('balloon_multiline')
+      let l:msg = join(a:msg, "\n")
+    else
+      let l:msg = substitute(join(map(deepcopy(a:msg), 'substitute(v:val, "\t", "", "")'), '; '), '{;', '{', '')
+    endif
   endif
 
   call balloon_show(l:msg)