bpo-37478: Add missing 'and'. (GH-14631)

Doc/library/os.rst

@@ -1599,7 +1599,7 @@ features:
    This function can support :ref:`specifying a file descriptor <path_fd>`.  The
    descriptor must refer to an opened directory, not an open file.
 
-   This function can raise :exc:`OSError` subclasses such as
+   This function can raise :exc:`OSError` and subclasses such as
    :exc:`FileNotFoundError`, :exc:`PermissionError`, and :exc:`NotADirectoryError`.
 
    .. versionadded:: 3.3