From 3060c6b2eae6965929530e23953db7717647813f Mon Sep 17 00:00:00 2001
From: Daniel Hahler <git@thequod.de>
Date: Tue, 26 Aug 2014 17:30:22 +0200
Subject: [PATCH] Do not `expand()` shell vars

This is especially important when testing/using variables that do not
exist, because then a new shell is spawned by Vim.
But since they should be available already in Vim from the (shell) env
there is no point in doing so.

See also: http://www.reddit.com/r/vim/comments/2el2zo
---
 syntax_checkers/sh/sh.vim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/syntax_checkers/sh/sh.vim b/syntax_checkers/sh/sh.vim
index d736f296..65d84a97 100644
--- a/syntax_checkers/sh/sh.vim
+++ b/syntax_checkers/sh/sh.vim
@@ -57,7 +57,7 @@ function! s:GetShell()
         endif
         " try to use env variable in case no shebang could be found
         if b:shell == ''
-            let b:shell = fnamemodify(expand('$SHELL'), ':t')
+            let b:shell = fnamemodify($SHELL, ':t')
         endif
     endif
     return b:shell