Use of non-breaking space in enrol instances page causes alignment issue

The up/down and edit icons on enrol/instances.php are separated by a non-breaking space. This is done via an implode() call. This causes an alignment issue at small breakpoints when the icons stack vertically, because the last icon in the set is not followed by a non-breaking space. If there needs to be spacing between the icons surely this can be done with CSS, and there's already some padding applied.