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Add a way for test suites to print colors #2911
with the current code, the stdout of a test suite is always attached to a pipe (and previously to a file), never to the terminal directly. This is unfortunate, as many test frameworks provide nice and useful coloring if attached to a terminal.
I suggest to add yet a nother mode to
In this case, no worrying thread spawning and lazy IO is requires, so this would also be a work-around for #2398.