Add example symptomatic output for the described issue (#757)
Add example symptomatic output for the described issue (#757)

* Add example symptomatic output for the described issue

* Fix doc format error:

Warning, treated as error:
/home/travis/build/tox-dev/tox/doc/example/pytest.rst:100:Error in "code-block" directive:
maximum 1 argument(s) allowed, 42 supplied.

Whoops!

Avira/tox,gaborbernat/tox,tox-dev/tox