Spotted this while reading the docs.
Word wrapping makes it less obvious, but the sentence previously read "The phrase after "ON UPDATE" or "ON DELETE" may also ~~other~~ allow other phrases".
In data definition language these are specified using phrases like "ON UPDATE
CASCADE", "ON DELETE CASCADE", and "ON DELETE SET NULL", corresponding to
foreign key constraints. The phrase after "ON UPDATE" or "ON DELETE" may also
-other allow other phrases that are specific to the database in use. The
+allow other phrases that are specific to the database in use. The
:class:`~sqlalchemy.schema.ForeignKey` and
:class:`~sqlalchemy.schema.ForeignKeyConstraint` objects support the
generation of this clause via the ``onupdate`` and ``ondelete`` keyword