Update Doc/library/stdtypes.rst

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>

Author: adorilson

Doc/library/stdtypes.rst

@@ -2191,9 +2191,7 @@ expression support in the :mod:`re` module).
    Return a string which is the concatenation of the strings in *iterable*.
    A :exc:`TypeError` will be raised if there are any non-string values in
    *iterable*, including :class:`bytes` objects.  The separator between
-   elements is the string providing this method.
-
-   For example:
+   elements is the string providing this method. For example:
 
    .. doctest::