Make mypy.api.run_dmypy actually capture the output #8375
Merged
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When the main run API was made threadsafe this broke output capturing
from run_dmypy. I don't really care about the threadsafety of
run_dmypy but I do care about output capture ever working, so I am
restoring the old sys.stdout swapping behavior for run_dmypy. I'd take
a patch to thread stdout through the client if anybody really cares.