Minor typo in README.rst

README.rst

@@ -392,7 +392,7 @@ If the function is called with no arguments, ``sys.argv[1:]`` is used. This is t
 Exceptions and limitations
 --------------------------
 
-- There are a few possible exceptions that ``autocommand`` can raise. All of them derive from ``autocommand.AutocommandError``
+- There are a few possible exceptions that ``autocommand`` can raise. All of them derive from ``autocommand.AutocommandError``.
 
   - If an invalid annotation is given (that is, it isn't a ``type``, ``str``, ``(type, str)``, or ``(str, type)``, an ``AnnotationError`` is raised. The ``type`` may be any callable, as described in the `Types`_ section.
   - If the function has a ``**kwargs`` parameter, a ``KWargError`` is raised.