gh-109961: Use proper module for copy method docs

[sobolevn]

This sets correct :module: context for builtins.object.{__copy__,__deepcopy__,__replace__}

Now their urls are:

• library/copy.html#object.__copy__
• library/copy.html#object.__deepcopy__
• library/copy.html#object.__replace__

All links seem to work.
CC @AA-Turner @hugovk @serhiy-storchaka

Refs #109968

• Issue: Incorrect rendering of __replace__ method in copy docs: consider adding copy.SupportsReplace? #109961

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📚 Documentation preview 📚: https://cpython-previews--110027.org.readthedocs.build/en/110027/library/copy.html

[serhiy-storchaka]

Other anchors for object methods do not contain "builtins." prefix. For example https://docs.python.org/3/reference/datamodel.html#object.__format__.

Did you try to use .. currentmodule:: .? I am not sure whether :module: . works.

[sobolevn]

@serhiy-storchaka hm, indeed. Will try that as well!

[sobolevn]

The result is identical. Please, take a look.

The difference with datamodel.rst is that datamodel.rst does not have .. module:: directive at all. While copy has it on the very top.

[sobolevn]

It is now correct: https://cpython-previews--110027.org.readthedocs.build/en/110027/library/copy.html#object.__copy__

[AA-Turner]

Thank you!

A

[AA-Turner]

@sobolevn -- when you do the backports, please could you include this commit in them? Saves merge conflicts etc.

A

[hugovk]

Thanks!