Complete implementation of interactive traceback support....
Complete implementation of interactive traceback support.
Ever since IPython started, we've had no proper tracebacks for
interactively entered code. The terminal version was fairly
uncomfortable for more than just a few lines of code, so this was
never too big of a deal. But the new architecture allows clients with
complex multiline input, and having proper tracebacks becomes now
critical for real-world use.
Thanks to Robert Kern for key implementation ideas and original patch.
Closes gh-177.
