bpo-40994: Ungroup items in collections.abc documentation for improved clarity (GH-21880) (#21927)

Use a less surprising document structure.

Automerge-Triggered-By: @csabella
(cherry picked from commit 2ce39631f679e14132a54dc90ce764259d26e166)

Co-authored-by: Sydney Pemberton <46042811+sydneypemberton1986@users.noreply.github.com>

1 files changed, 13 insertions, 5 deletions

diff --git a/Doc/library/collections.abc.rst b/Doc/library/collections.abc.rst
index dc7ae30..db0e25b 100644
--- a/Doc/library/collections.abc.rst
+++ b/Doc/library/collections.abc.rst
@@ -98,12 +98,20 @@ ABC                        Inherits from          Abstract Methods        Mixin
 
 
 .. class:: Container
-           Hashable
-           Sized
-           Callable
 
-   ABCs for classes that provide respectively the methods :meth:`__contains__`,
-   :meth:`__hash__`, :meth:`__len__`, and :meth:`__call__`.
+   ABC for classes that provide the :meth:`__contains__` method.
+
+.. class:: Hashable
+
+   ABC for classes that provide the :meth:`__hash__` method.
+
+.. class:: Sized
+
+   ABC for classes that provide the :meth:`__len__` method.
+
+.. class:: Callable
+
+   ABC for classes that provide the :meth:`__call__` method.
 
 .. class:: Iterable