[PATCH 0 of 1] make grep compare with parent

[Martin Geisler]

Hi,

I've looked at this patch and wanted to push it for Mercurial 1.3. But
I'm giving up since I don't understand the original code and also not
the new code. I'm sending an updated patch -- it gives a small error:

  cd tests && python run-tests.py  test-grep

  ERROR: test-grep output changed
  --- Expected output
  +++ Test output
  @@ -38,6 +38,6 @@
   noeol:4:no infinite loo
   % issue 685
   adding color
  +colour:1:octarine
   color:0:octarine
   colour:1:octarine
  -colour:1:octarine
  !
  Failed test-grep: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  make: *** [test-grep] Error 1

-- 
Martin