tree a09e99f5bdc9e1b1b10fd09a19b3820df1e92d33
parent 1cbdb0e0d8d7f9e01015dad53e7503bdb10e8d67
author Hai Shi <shihai1992@gmail.com> 1491225457 +0800
committer Hai Shi <shihai1992@gmail.com> 1491526020 +0000

[DOC] Fix details of tox

We need put a space between a param's name and a param's value in tox
and it would be more clear.
eg: from `tox -epy35` to `tox -e py35`.

Change-Id: I86750f42669bb02dcfac2b62e294d557bf44bd4c