Add example for str.endswith()

WIP to fix python#106318 using the contributions from python#105670

Author: blaisep

Doc/library/stdtypes.rst

@@ -1834,7 +1834,19 @@ expression support in the :mod:`re` module).
    Return ``True`` if the string ends with the specified *suffix*, otherwise return
    ``False``.  *suffix* can also be a tuple of suffixes to look for.  With optional
    *start*, test beginning at that position.  With optional *end*, stop comparing
-   at that position.
+   at that position. Use the *start* and *end* is equivalent to
+   ``str[start:end].endswith(suffix)``. For example::
+
+      >>> 'Python'.endswith('on')
+      True
+      >>> 'a tuple of suffixes'.endswith(('at', 'in'))
+      False
+      >>> 'a tuple of suffixes'.endswith(('at', 'es'))
+      True
+      >>> 'Python is amazing'.endswith('is', 0, 9)
+      True
+
+   See also :meth:`startswith` and :meth:`removesuffix`.
 
 
 .. method:: str.expandtabs(tabsize=8)