Normalize the encoding names for Latin-1 and UTF-8 to 'latin-1' and 'utf-8'.
Normalize the encoding names for Latin-1 and UTF-8 to
'latin-1' and 'utf-8'.

These are optimized in the Python Unicode implementation
to result in more direct processing, bypassing the codec
registry.

Also see issue11303.

pypa/setuptools,pypa/setuptools,pypa/setuptools