Much like the lower-level logic in commit ef2af1ad4, we had 4 copies of this logic, written in a couple of different ways. They're all implementing the same standard, so write it just once.
The `expand` option was introduced in 2000 in commit fad27aee1. It appears to have been always set since it was committed, and what it does is tell the code to do something essential. So, just always do that, and cut the option. Also cut the `linebreakprops` option, which isn't consulted anymore.
There were 10 copies of this, and almost as many distinct versions of exactly how it was written. They're all implementing the same standard. Pull them out to the top, so the more interesting logic that remains becomes easier to read.
They now return NotImplemented for unsupported type of the other operand.
* Fix typos in comments, docs and test names * Update test_pyparse.py account for change in string length * Apply suggestion: splitable -> splittable Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu> * Apply suggestion: splitable -> splittable Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu> * Apply suggestion: Dealloccte -> Deallocate Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu> * Update posixmodule checksum. * Reverse idlelib changes.
Use cffi to access a C API in Python.