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Trivial cleanups following bpo-31370 (#3649)

* Trivial cleanups following bpo-31370

* Also cleanup the "importlib._bootstrap_external" module
A
Antoine Pitrou committed
88c60c9668f0aa732693517a60b851cc1dfce0cb
Parent: b43c4ca
Committed by GitHub <noreply@github.com> on 9/18/2017, 9:50:44 PM