[Python-checkins] Update weakref.rst (GH-14098)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/30cac20101717e7cbb13db470787f8437bd98b04
commit: 30cac20101717e7cbb13db470787f8437bd98b04
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2019-06-15T04:50:11-07:00
summary:

Update weakref.rst (GH-14098)

(cherry picked from commit f475729a714a9fb13672f8989c4abbafb783e09b)

Co-authored-by: Géry Ogam <gery.ogam at gmail.com>

files:
M Doc/library/weakref.rst

diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst
index 7f3d267d74c2..8d8a0b5df268 100644
--- a/Doc/library/weakref.rst
+++ b/Doc/library/weakref.rst
@@ -65,8 +65,8 @@ exposed by the :mod:`weakref` module for the benefit of advanced uses.
 
 Not all objects can be weakly referenced; those objects which can include class
 instances, functions written in Python (but not in C), instance methods, sets,
-frozensets, some :term:`file objects <file object>`, :term:`generator`\s, type
-objects, sockets, arrays, deques, regular expression pattern objects, and code
+frozensets, some :term:`file objects <file object>`, :term:`generators <generator>`,
+type objects, sockets, arrays, deques, regular expression pattern objects, and code
 objects.
 
 .. versionchanged:: 3.2
@@ -80,9 +80,10 @@ support weak references but can add support through subclassing::
 
    obj = Dict(red=1, green=2, blue=3)   # this object is weak referenceable
 
-Other built-in types such as :class:`tuple` and :class:`int` do not support weak
-references even when subclassed (This is an implementation detail and may be
-different across various Python implementations.).
+.. impl-detail::
+
+   Other built-in types such as :class:`tuple` and :class:`int` do not support weak
+   references even when subclassed.
 
 Extension types can easily be made to support weak references; see
 :ref:`weakref-support`.