It would be very useful to have a tab supporting web output. Mostly what I'm interested in is a python-scriptable webkit container.
That would allow to make highly customised output, useful in lots of scenarios (take a look on what TM1 does with tests output for rspec, it's pretty amazing).
Additionally it would allow those of us who do web development to have a possibility of "internal" browser for any testing.
And just think about how it could improve the situation with in-editor API documentation.
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