Update browse_docs_sequence_test (#904)
Update browse_docs_sequence_test (#904)

Corrected class name for 'TaskSequence' and initialised self.toc_url and self.urls_on_current_page to None
mbeacom/locust,locustio/locust,mbeacom/locust,mbeacom/locust,locustio/locust,locustio/locust,mbeacom/locust,heyman/locust,locustio/locust