ipython/ipython — pull request #2549 by dwf (2012-11-05 23:27:03+00:00)
Title: Add a simple 'undo' for cell deletion.

@carreau's amazing work on the slideshow mode branch inspired me to try and fix something in IPython that's been bothering me for a little while: that there's no way to undo cell deletion.

I've accidentally deleted the wrong cell quite a few times and it has been quite frustrating. This enables a very hacky backup of the last cell deletion.

I'm sure the core devs will have some opinions on both the feature and its implementation, I consider this very much a first pass. A conversation starter, I guess.