Inconsistent documentation: are interned strings immortal or not?

Documentation

From HOWTO about python free-threading:

As of the 3.14 release, immortalization is limited to:

• Code constants: numeric literals, string literals, and tuple literals composed of other constants.
• Strings interned by sys.intern().

From sys.intern():

Interned strings are not immortal; you must keep a reference to the return value of intern() around to benefit from it.

So, are the interned strings immortal or not?

Linked PRs

• gh-144176

首先比较 free-threading HOWTO 中关于 immortalization 的部分与 sys.intern() 文档以及链接的 PR gh-144176。检查哪条表述反映了文档所述的行为，然后更新相互冲突的文档，使两个部分保持一致，并验证渲染后的措辞。