diff --git a/autoload/vundle/installer.vim b/autoload/vundle/installer.vim
index 89bdbf9..b52ece3 100644
--- a/autoload/vundle/installer.vim
+++ b/autoload/vundle/installer.vim
@@ -29,7 +29,9 @@ func! s:reload_bundles()
 endf
 
 func! s:has_doc(rtp)
-  return (isdirectory(a:rtp.'/doc') && (!filereadable(a:rtp.'/doc/tags') || filewritable(a:rtp.'/doc/tags')))
+  return (isdirectory(a:rtp.'/doc')
+        \ && (!filereadable(a:rtp.'/doc/tags')
+        \ || filewritable(a:rtp.'/doc/tags')))
 endf
 
 func! s:helptags(rtp)