--------------------

This patch teaches :doc:`the Ghostwriter <ghostwriter>` how to find
:np-ref:`custom ufuncs <ufuncs.html>` from *any* module that defines them,
and that ``yaml.unsafe_load()`` does not undo ``yaml.safe_load()``.

--------------------

This patch reduces the amount of internal code excluded from our test suite's
code coverage checks.

There is no user-visible change.

--------------------

This patch removes some old internal helper code that previously existed
to make Python 2 compatibility easier.

There is no user-visible change.

--------------------

This release adjusts some internal code to help make our test suite more
reliable.

There is no user-visible change.