Factorize argument checks in:

* vgetargskeywordsfast()
* vgetargskeywordsfast_impl()

Issue #29259: Write fast path in _PyCFunction_FastCallKeywords() for
METH_FASTCALL, avoid the creation of a temporary dictionary for keyword
arguments.

Cleanup also _PyCFunction_FastCallDict():

* Don't dereference func before checking that it's not NULL
* Move code to raise the "no keyword argument" exception into a new
  no_keyword_error label.

Update python-gdb.py for the change.

Changed stack layout bit for "easy to explain."

Thanks to Evan_ for the report and patch.

* Indent versionchanged at method level, not class level
* Mark up ``--help`` to avoid generating an en dash
* Use forward slash in Unix command line with a dollar sign ($) prompt

tarfile.TarFile.add().

ctypes.CDLL instances.

ctypes.CDLL instances.

ctypes.CDLL instances.

is now positional-only.

in methods of regular expression objects.