Fix error line reporting in style linting.
Fix error line reporting in style linting.

indirectlylit/kolibri,mrpau/kolibri,lyw07/kolibri,mrpau/kolibri,lyw07/kolibri,learningequality/kolibri,learningequality/kolibri,indirectlylit/kolibri,indirectlylit/kolibri,lyw07/kolibri,lyw07/kolibri,learningequality/kolibri,mrpau/kolibri,mrpau/kolibri,learningequality/kolibri,indirectlylit/kolibri