Changes detected by Topy (https://github.com/intgr/topy), all changes
verified by hand, false positives have been omitted.
These range from straight-out misspellings to debatable hyphen placement.
The hyphen changes are supported by grammar manuals of style.
This PEP now reviews exactly what is involved in migrating
mapping iteration code to Python 3, as well as to the
hybrid 2/3 subset.
It is now withdrawn, as I now believe enhancements to
migration tools and libraries are a better option than
making changes to Python 3.5+