patch 7.4.2031
Problem:    The list_lbr_utf8 test fails if ~/.vim/syntax/c.vim sets
            'textwidth' to a non-zero value. (Oyvind A. Holm)
Solution:   Add a setup.vim file that sets 'runtimepath' and $HOME to a safe
            value. (partly by Christian Brabandt, closes #912)
diff --git a/src/testdir/amiga.vim b/src/testdir/amiga.vim
index e0ca47a..79956d7 100644
--- a/src/testdir/amiga.vim
+++ b/src/testdir/amiga.vim
@@ -2,3 +2,5 @@
 set shell=csh
 map! /tmp t:
 cmap !rm !Delete all
+
+source setup.vim