From d28a1791ea0dcd4c9daf7b16cb819093f611951f Mon Sep 17 00:00:00 2001
From: Matt Wozniski <mjw@drexel.edu>
Date: Tue, 3 Mar 2009 21:43:31 -0500
Subject: [PATCH] Handle functions that return a:lines

The logic to clear a:lines and replace it with the return of the
function failed pretty miserably when the function returned a:lines.  It
cleared a:lines and then replaced it with the (now empty) elements.
---
 autoload/tabular.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/autoload/tabular.vim b/autoload/tabular.vim
index 9a8ef48..a10ee0c 100644
--- a/autoload/tabular.vim
+++ b/autoload/tabular.vim
@@ -139,7 +139,7 @@ endfunction
 function! s:FilterString(lines, commandstring)
   exe 'let rv = ' . a:commandstring
 
-  if type(rv) == type(a:lines)
+  if type(rv) == type(a:lines) && rv isnot a:lines
     call filter(a:lines, 0)
     call extend(a:lines, rv)
   endif