This release fixes some issues with Markdown and some issues with

editing JSON payloads (needed for the upcoming API token policy editor).
This is not the latest CodeMirror, but we had issues with the 4.x series

(4.2, specifically) last time we tried it. There's a 3.24 release, but

it's not on the online minifier yet.
The build of CodeMirror is also updated to support JSON/JavaScript

modes, and to support optional linting and brace matching.

Tested long text and several edits on the review request page. Didn't hit

any problems.
Tested with the new API token policy editor.