[Python-checkins] [python/cpython] e153f8: address PR comments

[GitHub]

  Branch: refs/heads/bpo-30014-selectors-modify-speedup
  Home:   https://github.com/python/cpython
  Commit: e153f846b9f1254143ffea2abe1d154ae2a27592
      https://github.com/python/cpython/commit/e153f846b9f1254143ffea2abe1d154ae2a27592
  Author: Giampaolo Rodola <g.rodola at gmail.com>
  Date:   2017-06-07 (Wed, 07 Jun 2017)

  Changed paths:
    M Doc/whatsnew/3.7.rst
    M Lib/selectors.py
    M Lib/test/test_selectors.py

  Log Message:
  -----------
  address PR comments