[PATCH 3/4] tox: Add 'docs' to default environments

[Stephen Finucane]

I'd simply run 'tox' (via docker) to validate some previous patches.
Sadly that didn't catch a release note issue. Make sure this doesn't
happen again by always running 'docs'.

Signed-off-by: Stephen Finucane <stephen at that.guru>
---
 tox.ini | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tox.ini b/tox.ini
index 09505f78..a7c6dfc6 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = pep8,py{27,34,35}-django{18,19,110,111},py36-django111
+envlist = pep8,docs,py{27,34,35}-django{18,19,110,111},py36-django111
 skipsdist = True
 
 [testenv]
-- 
2.14.3