PEP 715: list valid extensions (#3169)

Author: woodruffw

pep-0715.rst

@@ -21,7 +21,8 @@ deprecating and then disabling new uploads of distribution filenames that have
 the ``.egg`` suffix.
 
 After this PEP, PyPI will only accept new uploads of the ``sdist``
-and ``bdist_wheel`` types.
+and ``bdist_wheel`` types, corresponding to files with ``.tar.gz``/``.zip`` and
+``.whl`` suffixes respectively.
 
 This PEP does not recommend removing or otherwise affecting any previously
 uploaded ``bdist_egg`` distributions or files with the ``.egg`` suffix.