This is a followup to PRs #4117 and #4170.

As requested by @rhettinger, this PR:

• keeps doc-strings unchanged
• doesn't convert special dunder methods such as __reduce__ and __setstate__
• keeps variable names unchanged e.g. predicate as func: object
• doesn't move anything around, only adding a required list of static PyTypeObject declarations at the top

Since AC requires the doc-string to begin with a single summary line, I've kept most of those unchanged, despite in some cases exceeding 79 characters in length. @rhettinger, what should be done with those?

https://bugs.python.org/issue20180