patch 7.4.1851
Problem:    test_syn_attr failes when using the GUI. (Dominique Pelle)
Solution:   Escape the font name properly.
diff --git a/src/testdir/test_syn_attr.vim b/src/testdir/test_syn_attr.vim
index 51674d0..fe6acaf 100644
--- a/src/testdir/test_syn_attr.vim
+++ b/src/testdir/test_syn_attr.vim
@@ -27,7 +27,7 @@
     if fontname == ''
       let fontname = 'something'
     endif
-    exe 'hi Mine guifg=blue guibg=red font=' . escape(fontname, ' \')
+    exe "hi Mine guifg=blue guibg=red font='" . fontname . "'"
     call assert_equal('blue', synIDattr(hlID("Mine"), "fg", 'gui'))
     call assert_equal('red', synIDattr(hlID("Mine"), "bg", 'gui'))
     call assert_equal(fontname, synIDattr(hlID("Mine"), "font", 'gui'))