Clarified that ValueError raised by converter.to_python() means no match unless another URL pattern matches.
@@ -153,7 +153,7 @@ A converter is a class that includes the following:
string into the type that should be passed to the view function. It should
raise ``ValueError`` if it can't convert the given value. A ``ValueError`` is
interpreted as no match and as a consequence a 404 response is sent to the
- user.
+ user unless another URL pattern matches.
* A ``to_url(self, value)`` method, which handles converting the Python type
into a string to be used in the URL.
