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gh-120426: Reword the glossary term "immortal" (GH-123191) 

Reword the glossary term "immortal", mark it as an implementation detail
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Petr Viktorin 2024-08-27 13:37:56 +02:00 committed by GitHub
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Doc/glossary.rst
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@ -590,14 +590,12 @@ Glossary
which ships with the standard distribution of Python.
immortal
If an object is immortal, its reference count is never modified, and
therefore it is never deallocated.
*Immortal objects* are a CPython implementation detail introduced
in :pep:`683`.
Built-in strings and singletons are immortal objects. For example,
:const:`True` and :const:`None` singletons are immortal.
See `PEP 683 – Immortal Objects, Using a Fixed Refcount
<https://peps.python.org/pep-0683/>`_ for more information.
If an object is immortal, its :term:`reference count` is never modified,
and therefore it is never deallocated while the interpreter is running.
For example, :const:`True` and :const:`None` are immortal in CPython.
immutable
An object with a fixed value. Immutable objects include numbers, strings and