This (and some other things) will help avoid changes in uploaded notes, which
cause loss of cursor position and other problems after local notes are updated
with the server version.
A side effect is that multiple spaces won't be converted to ` `, so
anything consuming note content will have to use `white-space: pre`.
(Notes in reports appear to be substituting ` ` as necessary,
though I'm not sure where that's happening.)
bd8debb2df