normalize package:event-list
sort sorts a list of coinciding events, that is all events but
the first one have time difference 0.
normalize sorts all
coinciding events in a list thus yielding a canonical representation
of a time ordered list.
sort sorts a list of coinciding events, that is all events but
the first one have time difference 0.
normalize sorts all
coinciding events in a list thus yielding a canonical representation
of a time ordered list.
Sort coincident elements.