bump regendoc python version to 3.5

RonnyPfannschmidt · RonnyPfannschmidt · commit d3dcc2b8f103 · 2016-05-31T19:05:36.000+02:00
diff --git a/tox.ini b/tox.ini
@@ -107,7 +107,7 @@ commands= py.test -rfsxX {posargs}
 
 [testenv:regen]
 changedir=doc/en
-basepython = python3.4
+basepython = python3.5
 deps=sphinx
      PyYAML
      regendoc>=0.6.1
