docs(ngRepeat): Separate animation class in new lines

Moving to new lines & making it bold to avoid confusion
when they r all in same line without any separation

Closes angular#6633

Author: Basemm

src/ng/directive/ngRepeat.js

@@ -68,9 +68,11 @@
  * as **data-ng-repeat-start**, **x-ng-repeat-start** and **ng:repeat-start**).
  *
  * @animations
- * enter - when a new item is added to the list or when an item is revealed after a filter
- * leave - when an item is removed from the list or when an item is filtered out
- * move - when an adjacent item is filtered out causing a reorder or when the item contents are reordered
+ * **.enter** - when a new item is added to the list or when an item is revealed after a filter
+ *
+ * **.leave** - when an item is removed from the list or when an item is filtered out
+ *
+ * **.move** - when an adjacent item is filtered out causing a reorder or when the item contents are reordered
  *
  * @element ANY
  * @scope