Example:

https://github.com/openjdk/jdk/pull/135

Dan added "/csr" but I didn't notice so I added "/csr needed" and the bot kindly told me it had already been added. So I edited my comment to say:

/csr needed
Edit: I missed that this was already flagged.

That resulted in an email being generated:

http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2020-September/041857.html

which just looks completely weird as all context has been lost:

On Tue, 15 Sep 2020 01:55:39 GMT, David Holmes <dholmes at openjdk.org> wrote:
>> Daniel D. Daugherty has updated the pull request incrementally with one additional commit since the last revision:
>>
>> rkennke, coleenp, fisk CR - delete random assert() that knows too much about markWords.
>
> Marked as reviewed by dholmes (Reviewer).
Edit: I missed that this was already flagged.
-----

Now ideally there would be no email generated for this edit but I realize the bot may have trouble determining that. So instead perhaps a way to indicate no mail should be generated when I add the comment?