Closes #13676.

to PyShell.PyShell.transfer_path() and changing elsewhere as needed.
Original patches by Marco Scataglini and Roger Serwy.

Issue #13806: The size check in audioop decompression functions was too strict and could reject valid compressed data.
Patch by Oleg Plakhotnyuk.

Issue #13889: Add missing _Py_SET_53BIT_PRECISION_* calls around uses of dtoa.c functions in float round.

(rather than `-m test.regrtest`)

Issue #11235: Fix OverflowError when trying to import a source file whose modification time doesn't fit in a 32-bit timestamp.

Issue #12922: fix the TextIOBase documentation to include a description of seek() and tell() methods.