===
Removed ``local_format``, ``global_format``, and
``namespace_format``. Instead, developers should
use `f-strings
<https://docs.python.org/3.6/reference/lexical_analysis.html#f-strings>`_
on Python 3.6 and later or `future-fstrings
<https://pypi.org/project/future-fstrings>`_ for compatibilty
with older Pythons. This change eliminates the dependency on
jaraco.collections and thus for now removes the circular dependency
as reported in 3.