t / t4135 / diff-with spaces.diffon commit sequencer (rebase -i): add support for the 'fixup' and 'squash' commands (6e98de7)
   1--- post image.txt.orig 2010-08-18 20:13:31.544002255 -0500
   2+++ post image.txt      2010-08-18 20:13:31.544002255 -0500
   3@@ -1 +1 @@
   4-preimage
   5+postimage