[Bug 1804062] Related fix proposed to nova (stable/stein)

[OpenStack Infra]

Related fix proposed to branch: stable/stein
Review: https://review.opendev.org/664841

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https://bugs.launchpad.net/bugs/1804062

Title:
  test_hacking fails for python 3.6.7 and newer

Status in Ubuntu Cloud Archive:
  Triaged
Status in Ubuntu Cloud Archive queens series:
  Triaged
Status in Ubuntu Cloud Archive rocky series:
  Triaged
Status in Ubuntu Cloud Archive stein series:
  Triaged
Status in masakari:
  New
Status in OpenStack Compute (nova):
  Confirmed
Status in nova package in Ubuntu:
  Triaged
Status in nova source package in Bionic:
  Triaged
Status in nova source package in Cosmic:
  Triaged
Status in nova source package in Disco:
  Triaged
Status in nova source package in Eoan:
  Triaged

Bug description:
  The check for double words in test_hacking is failing in python 3.6.7
  (released in ubuntu 18.04 within the last few days) and in new
  versions of 3.7.x. This is is because of this change to python:
  https://bugs.python.org/issue33899 .

  This is causing failures in python 36 unit tests for nova.

  The fix ought to be adding a newline to the code sample. Maybe.

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