--- a.vim.orig	2004-09-16 15:13:29 +0600

+++ a.vim	2004-09-17 15:57:54 +0600

@@ -16,6 +16,10 @@

 "       b) Priorities for search paths

 "       c) <leader>A on a #include line should go to that header

+if !exists("use_alternate_plugin")

+    finish

+endif

+

 " Do not load a.vim if is has already been loaded.

 if exists("loaded_alternateFile")

     finish