Values in the range of an unsigned long long, but outside of the range
of a signed long long were serialized as a negative value.

Due to a bug in PyObjC my test scripts indicated that the previous behavior
matched Apple's plist code, instead the handle large unsigned values correctly.

The change to plistlib.py is from a patch by Serhiy.

containing non-encodable characters.  Added tests for TarFile.list().
Based on patch by Vajrasky Kok.

containing non-encodable characters.  Added tests for TarFile.list().
Based on patch by Vajrasky Kok.

TestNamedTuple.test_pickle was only testing through protocol 2. Changed to have it automatically test through the most recent version.

CID 1167595

CID 1167595

ensurepip now sets PIP_CONFIG_FILE to os.devnull before
import pip from the wheel file. This also ensures venv
ignores the default settings when bootstrapping pip.

- io.TextIOWrapper (and hence the open() builtin) now use the
  internal codec marking system added for issue #19619
- also tweaked the C code to only look up the encoding once,
  rather than multiple times
- the existing output type checks remain in place to deal with
  unmarked third party codecs.

Do nothing if the pipe is already closed. _loop_writing() may call
_force_close() when it gets ConnectionResetError.

Tulip (changeset d7ac90c0463a)

Process.subprocess read-only property

The '**' operator is available only since 8.5 and in any case such large
integers are not supported on Tcl <8.5.