Issue pull request for branch unicode-highlight-cache-62434202-62433730
Issue pull request for branch unicode-highlight-cache-62434202-62433730

[Delivers #62454210](https://www.pivotaltracker.com/story/show/62454210)
[Delivers #62434202](https://www.pivotaltracker.com/story/show/62434202)
[Delivers #62433730](https://www.pivotaltracker.com/story/show/62433730)
[Delivers #62358298](https://www.pivotaltracker.com/story/show/62358298)
[Delivers #62352812](https://www.pivotaltracker.com/story/show/62352812)

softcover/polytexnic,minireference/polytexnic,softcover/polytexnic,minireference/polytexnic