Patch from Andrew Barnert.

(No idea why test_tarfile is listed as changed...it isn't.)

This fixes an edge case (20206) where if the input ended in a character
needing encoding but there was no newline on the string, the last byte
of the encoded character would be dropped.  The fix is to use a more
efficient algorithm, provided by Serhiy Storchaka (5803), that does not
have the bug.

Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in modules and in documentation.

Issue #19082: Working xmlrpc.server and xmlrpc.client examples. Both in modules and in documentation.

methods.

Argument Clinic (see issue for details).

parsing code for functions with positional-only parameters where all arguments
are optional.

functions now conform to PEP 3333 when handle non-ASCII URLs.

functions now conform to PEP 3333 when handle non-ASCII URLs.

Issue #19092 - Raise a correct exception when cgi.FieldStorage is given an
invalid file-obj. Also use __bool__ to determine the bool of the FieldStorage
object.