Not quite a brown-paper-bag bug, but I broke the PS1 prompt for the shell command. Not all that earth shattering, but the following trivial patch fixes it.

It was due to using an old mock-helper which didn't have the PS1 in ALLOWED_ENVS and the fact that I didn't notice that os.system() doesn't pass along changes to os.environ.

--
Michael

<<mock-fixps1.patch>>