[thisisshivamtiwari]

Type of Changes

	Type
✓	📜 Docs

Description

As suggested in #7724 (comment), this adds an "Additional details" section to the comparison-with-callable message page. It covers code that compares callables on purpose, such as checking which function was passed in:

• Use is instead of ==. Plain functions are only equal to themselves, so the result is the same. is is not in the operators this check looks at, so the message is not emitted.
• Bound methods are the exception. obj.method is obj.method is False, because each attribute access creates a new bound method, so the section suggests comparing __func__ instead.

I checked both claims locally. callback is print is not reported and callback == print is. For a bound method cb = obj.greet, cb is obj.greet is False and cb.__func__ is Greeter.greet is True. The new details.rst passes the rstcheck, prettier and codespell pre-commit hooks, and docutils renders it without warnings. doc/test_messages_documentation.py -k comparison-with-callable passes. I did not build the full Sphinx docs locally.

This is a documentation-only change, so I did not add a news fragment.

Closes #7724

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