ipython/ipython — pull request #3844 by minrk (2013-07-30 20:06:08+00:00)
Title: update payload source

should be simple key, not Python- (or worse, IPython-) specific long key.

I could have sworn I did this long ago, but apparently the source key was only updated in display_data, not execute_reply.

Since the current state is internally inconsistent, marking for 1.0.