Comment (by Roland Haas):

I think the email is correct. I accidentally added that comment to the wrong ticket and then deleted the comment. So that comment would not show up in the web-view of the ticket right now but will show up in emails (which are generated the moment one modifies a ticket). We may have to add a “removed comment” case, though I am not sure if Bitbucket lets on hook into that event.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2523/the-trac-mailing-list-could-have-more