Add missing space in exception error

[mardiros]

The exception message for InvalidArgument is missing a space before:

        try:
            props[PROP_ATTRS] = HTMLAttrs(extra)
        except Exception as exc:
>           raise InvalidArgument(
                f"The arguments of the component <{component.name}>"
                f"were parsed incorrectly as:\n {str(kw)}"
            ) from exc
E           jinjax.exceptions.InvalidArgument: The arguments of the component <DummyComponent>were parsed incorrectly as:
E            {'widget': Undefined}