The Flocking Playground throws errors when a user types code into the CodeMirror editor

[colinbdclark]

In the console, the Flocking Playground is showing errors when typing into the CodeMirror editor. The error is:

windows.JSHINT is not defined, CoreMirror JavaScript linting cannot run.

It looks like a CodeMirror upgrade at some point in the past may have caused it to be unable to lint the code as it's being edited?