"Kristoffer Haugsbakk" [off-list ref] writes:

quoted

From: Teng Long <redacted>

When adding new notes or appending to an existing notes, we will
insert a blank line between the paragraphs, like:

I was wondering why it acts this way. So of minor historical note (may
be obvious to everyone else): it was in order to mirror how `git commit
-m` works. From commit d9246d4303f (Teach "-m <msg>" and "-F <file>" to
"git notes edit", 2009-10-09):

Yes, I noticed it too, but I'm not sure whether there exists the same
requirement in `git commit -m <message> -F <file> ...`, `git commit` is
usually a more frequently used subcommand, firstly introduced it to
`git notes` maybe is a good idea, but I'm not going to touch `git commit`
yet, unless we find someone who has a strong need.

Thanks.