Alexis S. L. Carvalho <alexis@cecm.usp.br> [Fri, 21 Jul 2006 01:51:17 -0300] rev 2703
run-tests.py: fix diff output when test-foo.out doesn't exist.
Previously, if test-foo.out doesn't exist and test-foo outputs
something, the first line of the diff will look like this:
-+changeset: 0:0acdaf898367
(note the leading "-")