Exit console via continue during pytest interactive debugging

[iamdefinitelyahuman]

What I did

Modify how the console is exited during pytest interactive debugging:

• continue runs the next test
• exit() or quit() halts execution

This might surprise some people who've gotten used to the current behavior but I'm guessing more will like it than dislike it.

How I did it

Added a exit_on_continue kwarg to the init method of Console. When True, a check in Console.runsource checks the source before compiling, and if continue is found, it raises a SystemExit with error message "continue". This error message is then caught in the pytest runner and used to decide how to interpret the exit command.

How to verify it

Try it.