gh-128039: Clarify the uninstallation instructions for Mac.

[offby1]

I've applied the wording that I suggested in #128039 .

• Issue: Please clarify the uninstallation instructions for Mac #128039

---

📚 Documentation preview 📚: https://cpython-previews--128040.org.readthedocs.build/

[ned-deily]

Thank you for the PR! My only suggestion is to include the free-threaded option in the list.

[bedevere-app]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[hugovk]

Rather than hardcoding 3.13 which is only correct for a single branch, let's use a "replacement":

Suggested change

	* A :file:`3.13` folder (under the "framework" :file:`/Library/Frameworks/Python.framework`), which includes the
	* A |usemac_x_dot_y_literal| folder (under the "framework" :file:`/Library/Frameworks/Python.framework`), which includes the

And add it with the others in this file:

 .. |usemac_x_dot_y| replace:: 3.13
+.. |usemac_x_dot_y_literal| replace:: ``3.13``
 .. |usemac_python_x_dot_y_literal| replace:: ``python3.13``
 .. |usemac_python_x_dot_y_t_literal| replace:: ``python3.13t``
 .. |usemac_python_x_dot_y_t_literal_config| replace:: ``python3.13t-config``

And actually, those are still hardcoded, so let's remove the usemac_ prefix and integrate them into the rst_epilog which uses the current version number:

cpython/Doc/conf.py

Lines 77 to 80 in be8ae08

	rst_epilog = f"""
	.. |python_version_literal| replace:: ``Python {version}``
	.. |python_x_dot_y_literal| replace:: ``python{version}``
	.. |usr_local_bin_python_x_dot_y_literal| replace:: ``/usr/local/bin/python{version}``

The rst_epilog replacements are available for all pages.

[offby1]

This is surely The Right Thing®, but I'm unfamiliar enough with ReStructured Text to do it myself (I took a stab at it and found myself going in circles after an hour).

[hugovk]

That's fine, we can do it in a followup. Thank you for trying!