Issue #2412

Added django.js which implements the following modes

  - django (text/x-django)
  - django:inner

Issue #988

(It wasn't working in the first place.)

Issue #2360

Issue #2305

pressing Ctrl-Space once starts the selection extension mode,
pressing it again cancels that

It was broken and confused.

Make the mode register a list of completable words instead.

Issue #2324

Since it's what you want most of the time, and easy to forget.

Issue #2305

Require explicit turning on of history event merging.

Issue #2305

Per change authored in https://github.com/marijnh/CodeMirror/pull/1979.

Closes #2200

Issue #2281