t / t4135 / diff-plain.diffon commit parse-options: fix clang opterror() -Wunused-value warning (a3bc3d0)
   1--- postimage.txt.orig  2010-08-18 20:13:31.432002255 -0500
   2+++ postimage.txt       2010-08-18 20:13:31.432002255 -0500
   3@@ -1 +1 @@
   4-preimage
   5+postimage