Patch by Vincent Michel.

os.walk() function and glob module since os.scandir() now directly supports
them.

We can't just skip the test if docutils is available,
but pygments is not because the purpose of the test
was testing a bug in _check_rst_data().

Patch by Mariatta Wijaya.

Reported by Xiang Zhang.

Original patch by Xiang Zhang.

Original patch by Xiang Zhang.

Initial patch by Ethan Furman.

Patch by Ethan Furman.

Patch by Vajrasky Kok.

message when pass a non-mapping as a var-keyword argument.

a var-positional argument.  Added opcode BUILD_TUPLE_UNPACK_WITH_CALL.