* bpo-37697: Sync with importlib_metadata 0.19

* Run make regen-importlib

* 📜🤖 Added by blurb_it.

Use an example shell interaction in the sample and better labels for shell elements.

The boxes for the font and highlight samples are now constrained by the overall config dialog size.  They gain scrollbars when the when a large font size makes the samples too large for the box.

Add __all__ to tkinter.__init__ and submodules.  Replace 'import *'
with explicit imports in some submodules.

Previously, pyc files in the embeddable distribution reported their
location as <build path>/<file stem>.py. This causes a little confusion
when interpreting stack traces as the file is in a (almost certainly)
incorrect location, and lacks the full relative path to Lib (e.g.
email/mime/image.py will only show image.py).

This change preserves the Lib relative location of the source file as a
path so that stack traces are (hopefully) less misleading and more
informative.
Co-Authored-By: Kyle Stanley <aeros167@gmail.com>

Prior to this change the guard on an 'elif' used an assignment expression whose value was used in a later 'else' block, causing some confusion for people.

(Discussion on Twitter: https://twitter.com/brettsky/status/1153861041068994566.)

Automerge-Triggered-By: @brettcannon

* Fix the formatting in the documentation of the tostring() functions.

* bpo-34160: Document that the tostring() and tostringlist() functions also preserve the attribute order now.

* bpo-34160: Add an explanation of how users should deal with the attribute order.

* bpo-37399: Correctly attach tail text to the last element/comment/pi, even when comments or pis are discarded.
Also fixes the insertion of PIs when "insert_pis=True" is configured for a TreeBuilder.

Verify that it appears to find roughly the right number of tests in the stdlib's testsuite.

Stop depending on tkinter import *.

Reduce the number of unit tests run for the PGO generation task.  This
speeds up the task by a factor of about 15x.  Running the full unit test
suite is slow.  This change may result in a slightly less optimized build
since not as many code branches will be executed.  If you are willing to
wait for the much slower build, the old behavior can be restored using
'./configure [..] PROFILE_TASK="-m test --pgo-extended"'.  We make no
guarantees as to which PGO task set produces a faster build.  Users who
care should run their own relevant benchmarks as results can depend on
the environment, workload, and compiler tool chain.

Update logging cookbook to show multiple worker processes using the concurrent.futures module. (#14905)

bpo-21478: Record calls to parent when autospecced objects are used as child with attach_mock (GH 14688)

* Clear name and parent of mock in autospecced objects used with attach_mock

* Add NEWS entry

* Fix reversed order of comparison

* Test child and standalone function calls

* Use a helper function extracting mock to avoid code duplication and refactor tests.

Minor whitespace, indentation, and quoting changes to improve internal consistency and appease linters (GH-14888)

Repeat the command line arguments most recently entered before so the user can edit them.

* Make internals private

* Finish making mu and sigma private

* Add missing __hash__() method

* Add blurb