PEP 661: Fix citation references

[hugovk]

pep-0661.rst:323: WARNING: Footnote [5] is not referenced.
pep-0661.rst:324: WARNING: Footnote [6] is not referenced.
pep-0661.rst:325: WARNING: Footnote [7] is not referenced.
pep-0661.rst:326: WARNING: Footnote [8] is not referenced.

These are not referenced in the text. Let's fix by converting to a bullet list (like in #2644).

Let's also convert the remaining references to inline links, per #2130, and remove the redundant emacs metadata.

Preview

https://pep-previews--2698.org.readthedocs.build/pep-0661/

[CAM-Gerlach]

I usually make indirect external-link references anonymous, to avoid creating duplicate or unintended second-order reference targets, particularly for the rather generic words that are often linked.

Otherwise, LGTM. Thanks @hugovk !

[hugovk]

Shall I update them to be anonymous? And if so, can you give me an example of the syntax? :)

[CAM-Gerlach]

Shall I update them to be anonymous? And if so, can you give me an example of the syntax? :)

Up to you, but you just add an extra trailing underscore, so instead of

`link text <https://example.com>`_

you do

`link text <https://example.com>`__

or in this case, instead of

`link text <link-target_>`_

you do

`link text <link-target_>`__

Find/replacing _>`_ with _>`__ should do the trick.

[hugovk]

Thanks, that could save us some bother later, updated!

[CAM-Gerlach]

Thanks! I guess we can merge this then ✔️