Update Doc/library/stdtypes.rst

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: adorilson

Doc/library/stdtypes.rst

@@ -2577,8 +2577,7 @@ expression support in the :mod:`re` module).
    Return a copy of the string with trailing characters removed.  The *chars*
    argument is a string specifying the set of characters to be removed.  If omitted
    or ``None``, the *chars* argument defaults to removing whitespace.  The *chars*
-   argument is not a suffix; rather, all combinations of its values are stripped:
-
+   argument is not a suffix; rather, all combinations of its values are stripped.
    For example:
 
    .. doctest::