tests/test-debugrename.out

git patches: correct handling of filenames with spaces

Add a trailing TAB to the "--- filename" lines if there's a space
in the file name.  This allows patch(1) to work correctly.  The
same is done for diff --nodates.

This was originally suggested by Andrei Vermel, but at the time
I thought git was doing something different.

adding a
b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
a renamed from b:9a263dd772e0159ddfa70fb8a448bb6c7ec8c69f
% test with --rev
b renamed from a:b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3