Pytest fixes (#9)

* pytest: fix collection warnings via __test__=False

Fixes

> "cannot collect test class %r because it has a __init__ constructor

Ref: https://github.com/pytest-dev/pytest/issues/2007

* pytest: configure testpaths

This is faster with test collection.

* pytest: fix warning with doctests

Fixes

> /usr/lib/python3.7/site-packages/_pytest/python.py:764:
> RemovedInPytest4Warning: usage of Generator.Function is deprecated,
> please use pytest.Function instead

* Minor fixes around s/py.test/pytest/

1 files changed, 1 insertions, 1 deletions

diff --git a/tox.ini b/tox.ini
index 291442d..00ecf6e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -11,4 +11,4 @@ deps =
 setenv =
     coverage: PYTEST_ADDOPTS=--cov --cov-report=term-missing
 commands =
-    py.test {posargs}
+    pytest {posargs}