[PATCH] test: Produce useful output when the HTML with images test fails

[David Bremner]

Austin Clements <amdragon at MIT.EDU> writes:

> Previously, this would simply indicate that the grep failed without
> any indication of the Emacs output it failed on.  Now we take
> advantage of the test framework's handling of stdout to display the
> incorrect Emacs output if the test fails.

Pushed. Along with a rebuild of emacs on the buildbot, we have all tests
passing on emacs 24.

d