Fixed the segfaults on application exit. The BracketMatcher, CallTipWidget, and CompletionWidget were using the text control as their parents. This should not be a problem, but for some reason it resulted in problems during shutdown. I suspect that PyQt is bugged and was deleting the C++ objects a second time in the garbage collection phase after they had already been deleted automatically by the C++ layer of Qt.

ConsoleWidget now prefers Consolas to Courier in Windows.

More pythonw.exe-specific fixes to the kernel launching pipeline.

Fix bug where 'if 1:' was being added to comment-only code. Found by trying to paste and run this example: http://matplotlib.sourceforge.net/examples/api/collections_demo.html that happened to have indented, comment-only lines of the type: code() # comment code() In these cases, we should *not* try to prepend 'if 1:' to the user's code since that comment by itself isn't executable, and it will cause a compiler IndentationError.

Let the auto pylab backend detection work. The kernel knows how to find the user's backend choice, so if no backend is explicitly given, read it from the matplotlibrc file.

Fix paste bug where trailing newlines required a manual backspace.

Add support for "foo??" which I'd forgotten to do.

Move terminal-only magics to the terminal class. This lets us keep in the base class only what's common to all frontends.

Fixed broken coloring on Windows. As part of the process, cleaned up a little bit our globalipapp code to manage test-specific overrides somewhat better.

Fix missing history in cell execution mode. Also cleaned up and commented run_cell a little better, no need to run using map() when a single run_code call suffices.