  [testenv:py27-docs]
  deps =
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-documentation.txt
  commands = mkdocs build
 
</s> remove commands = ./runtests.py --lintonly
 </s> add  </s> remove [testenv:py27-flake8]
 </s> add [testenv:py27-lint]
commands = ./runtests.py --lintonly
  [testenv:py27-docs]
  deps =
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-documentation.txt

keep keep keep keep replace
 Setup isort for code style linting 
tox.ini