Fix vim's file detection for gnu arch generated unified diffs:
--- /tmp/scripts.vim	2005-04-21 12:13:24.000000000 +0200
+++ scripts.vim	2005-04-21 12:14:38.000000000 +0200
@@ -175,6 +175,7 @@
   elseif s:line1 =~ '^\(diff\>\|Only in \|\d\+\(,\d\+\)\=[cda]\d\+\>\|# It was generated by makepatch \|Index:\s\+\f\+$\|===== \f\+ \d\+\.\d\+ vs edited\|==== //\f\+#\d\+\)'
 	\ || (s:line1 =~ '^--- ' && s:line2 =~ '^+++ ')
 	\ || (s:line1 =~ '^\*\*\* ' && s:line2 =~ '^--- ')
+	\ || (s:line1 =~ '^\* looking for ' && s:line2 =~ '^\* comparing to ')
     set ft=diff
 
     " PostScript Files (must have %!PS as the first line, like a2ps output)