Exclude inline comments from envlist (tox-dev#680)

* Make test failing by adding inline comment. * Exclude inline comments from envlist.

Author: andreif

tests/test_config.py

@@ -2180,7 +2180,7 @@ def test_listenvs_all_verbose_description(self, cmd, initproj):
  initproj('listenvs_all_verbose_description', filedefs={
  'tox.ini': '''
  [tox]
- envlist={py27,py36}-{windows,linux}
+ envlist={py27,py36}-{windows,linux} # py26
  [testenv]
  description= py27: run pytest on Python 2.7
  py36: run pytest on Python 3.6

tox/config.py

@@ -906,8 +906,8 @@ def _getenvdata(self, reader):
 def _split_env(env):
  """if handed a list, action="append" was used for -e """
  if not isinstance(env, list):
- if '\n' in env:
-  env = ','.join(env.split('\n'))
+ env = [e.split('#', 1)[0].strip() for e in env.split('\n')]
+ env = ','.join([e for e in env if e])
  env = [env]
  return mapcat(_expand_envstr, env)