This reverts commit a50f0a4c.

Co-Authored-By: Antoine <43954001+awecx@users.noreply.github.com>

* fix Path._add_implied_dirs to include all implied directories

* fix Path._add_implied_dirs to include all implied directories

* Optimize code by using sets instead of lists

* 📜🤖 Added by blurb_it.

* fix Path._add_implied_dirs to include all implied directories

* Optimize code by using sets instead of lists

* 📜🤖 Added by blurb_it.

* Add tests to zipfile.Path.iterdir() fix

* Update test for zipfile.Path.iterdir()

* remove whitespace from test file

* Rewrite NEWS blurb to describe the user-facing impact and avoid implementation details.

* remove redundant [] within set comprehension

* Update to use unique_everseen to maintain order and other suggestions in review

* remove whitespace and add back add_dirs in tests

* Add new standalone function parents using posixpath to get parents of a directory

* removing whitespace (sorry)

* Remove import pathlib from zipfile.py

* Rewrite _parents as a slice on a generator of the ancestry of a path.

* Remove check for '.' and '/', now that parents no longer returns those.

* Separate calculation of implied dirs from adding those

* Re-use _implied_dirs in tests for generating zipfile with dir entries.

* Replace three fixtures (abcde, abcdef, abde) with one representative example alpharep.

* Simplify implementation of _implied_dirs by collapsing the generation of parent directories for each name.

Fix compilation of "break" and "continue" in the
"finally" block when the corresponding "try" block
contains "return" with a non-constant value.

Fix typo in description of link to mozilla bug report writing guidelines.

Though the URL is misleading, we're indeed trying to write bug _reports_, not to add bugs.

Automerge-Triggered-By: @ned-deily

PyConfig_Read() is now responsible to handle early calls to
PySys_AddXOption() and PySys_AddWarnOption().

Options added by PySys_AddXOption() are now handled the same way than
PyConfig.xoptions and command line -X options.

For example, PySys_AddXOption(L"faulthandler") enables faulthandler
as expected.

_PyTime_t type is defined as int64_t, and so min/max are INT64_MIN/INT64_MAX,
not PY_LLONG_MIN/PY_LLONG_MAX.

Replace test.support.run_unittest() with unittest.main()
to automatically discover test cases, instead of having
an maintaing manually a list which may be incomplete.

Remove also an unused variable.

Fix code handling TimeoutExpired exception in _timedout().

empty_argv is no longer static in Python 3.8, but it is declared in
a temporary scope, whereas argv keeps a reference to it.
empty_argv memory (allocated on the stack) is reused by
make_sys_argv() code which is inlined when using gcc -O3.

Define empty_argv in PySys_SetArgvEx() body, to ensure
that it remains valid for the whole lifetime of
the PySys_SetArgvEx() call.

https://bugs.python.org/issue37915



Automerge-Triggered-By: @pablogsal

This adds a regression test for the issue found in the Python 2 backport, see https://github.com/python/typing/issues/656


https://bugs.python.org/issue28556

This typo was introduced in GH-13409 when changing the message text.

* Refactor Parser/pgen and add documentation and explanations

To improve the readability and maintainability of the parser
generator perform the following transformations:

    * Separate the metagrammar parser in its own class to simplify
      the parser generator logic.

    * Create separate classes for DFAs and NFAs and move methods that
      act exclusively on them from the parser generator to these
      classes.

    * Add docstrings and comment documenting the process to go from
      the grammar file into NFAs and then DFAs. Detail some of the
      algorithms and give some background explanations of some concepts
      that will helps readers not familiar with the parser generation
      process.

    * Select more descriptive names for some variables and variables.

    * PEP8 formatting and quote-style homogenization.

The output of the parser generator remains the same (Include/graminit.h
and Python/graminit.c remain untouched by running the new parser generator).

bpo-36311: Fixes decoding multibyte characters around chunk boundaries and improves decoding performance (GH-15083)

Special characters in email address header display names are normally
put within double quotes. However, encoded words (=?charset?x?...?=) are
not allowed withing double quotes. When the header contains a word with
special characters and another word that must be encoded, the first one
must also be encoded.

In the next example, the display name in the From header is quoted and
therefore the comma is allowed; in the To header, the comma is not
within quotes and not encoded, which is not allowed and therefore
rejected by some mail servers.

From: "Foo Bar, France" <foo@example.com>
To: Foo Bar, =?utf-8?q?Espa=C3=B1a?= <foo@example.com>





https://bugs.python.org/issue37482

bpo-37663: have venv activation scripts all consistently use __VENV_PROMPT__ for prompt customization (GH-14941)

The activation scripts generated by venv were inconsistent in how they changed the shell's prompt. Some used `__VENV_PROMPT__` exclusively, some used `__VENV_PROMPT__` if it was set even though by default `__VENV_PROMPT__` is always set and the fallback matched the default, and one ignored `__VENV_PROMPT__` and used `__VENV_NAME__` instead (and even used a differing format to the default prompt). This change now has all activation scripts use `__VENV_PROMPT__` only and relies on the fact that venv sets that value by default.

The color of the customization is also now set in fish to the blue from the Python logo for as hex color support is built into that shell (much like PowerShell where the built-in green color is used).