Protect against absent global IPython instance....
Protect against absent global IPython instance.
This basically applies most of the changes to ultraTB made by Brian in the
reorg branch here:
http://bazaar.launchpad.net/~ipython-dev/ipython/module-reorg/revision/1225
To our duplicate copies of ultraTB (the duplication is already gone in the
reorg branch).
This now means that the trial-based tests run fine if executed as
trial IPython
OR
trial IPython.kernel
where as the latter form was failing before. The reason why the former used
to work was that a hidden global ipython is created, *upon import*, by
ipdoctest. That will stay for now, but I've made it bug
https://bugs.launchpad.net/ipython/+bug/409096
marked as critical for 0.11 that I'll need to fix.
