[issue37937] Mention ``frame.f_trace`` in :func:`sys.settrace` docs.

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:


New changeset 9c2682efc69568e1b42a0c1759489d6f2e3b30ea by Nick Coghlan (Ram Rachum) in branch 'master':
bpo-37937: Mention frame.f_trace in sys.settrace docs (GH-15439)
https://github.com/python/cpython/commit/9c2682efc69568e1b42a0c1759489d6f2e3b30ea


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nosy: +ncoghlan

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