removes an un-necessary comma when ellipsing notifications

Signed-off-by: Cyrille Bollu <cyrpub@bollu.be>

src/components/TimelineEntry.vue

@@ -74,6 +74,7 @@ export default {
 
 						if (this.item.details[key].length > 3 && stringKey === 3) {
 							// ellipses the actors' list to 3 actors when it's big
+							concatination = concatination.substring(0, concatination.length - 2)
 							concatination += 'and ' + (this.item.details[key].length - 3).toString() + ' other(s), '
 							break
 						} else {