ipython/ipython — pull request #999 by MattCottingham (2011-11-14 14:10:27+00:00)
Title: Fix issue #880 - more useful message to user when %paste fails

When tkinter is not installed and '%paste' is run, the user is now prompted to install it.

Initializes TryNext exception in CommandChainDispatcher with args/kwargs to present a message to the user with the traceback.