docs: fix the tox links
@@ -21,11 +21,11 @@ Before code is pulled into the master jsonpickle branch, all tests should pass.
If you are contributing an addition or a change in behavior, we ask that you
document the change in the form of test cases.
-The test suite is most readily run with the tox_ testing tool.
-Once installed, run the test suite against the default Python::
-
.. _tox: https://tox.readthedocs.io/
+The test suite is most readily run with the `tox`_ testing tool.
+Once installed, run the test suite against the default Python::
+
tox
It is recommended that you install at least one Python2 and one Python3
