Revert "gh-106318: Remove str.removesuffix() example from str.rsplit() method doc"

This reverts commit 9fa3ecc.

As asked by @nedbat on gh-143893

Author: adorilson

Doc/library/stdtypes.rst

@@ -2616,7 +2616,13 @@ expression support in the :mod:`re` module).
       >>> 'mississippi'.rstrip('ipz')
       'mississ'
 
-   See also :meth:`strip` and :meth:`removesuffix`.
+   See :meth:`str.removesuffix` for a method that will remove a single suffix
+   string rather than all of a set of characters.  For example::
+
+      >>> 'Monty Python'.rstrip(' Python')
+      'M'
+      >>> 'Monty Python'.removesuffix(' Python')
+      'Monty'
 
 
 .. method:: str.split(sep=None, maxsplit=-1)