patch 7.4.2228
Problem:    Test files have inconsistant modelines.
Solution:   Don't set 'tabstop' to 2, use 'sts' and 'sw'.
diff --git a/src/testdir/test_backspace_opt.vim b/src/testdir/test_backspace_opt.vim
index 7fbba96..fd81f42 100644
--- a/src/testdir/test_backspace_opt.vim
+++ b/src/testdir/test_backspace_opt.vim
@@ -56,4 +56,4 @@
   set nocompatible viminfo+=nviminfo
 endfunc
 
-" vim: tabstop=2 shiftwidth=0 expandtab
+" vim: shiftwidth=2 sts=2 expandtab