Hello,
In these days we will migrate all Google Code issues to GitHub, and it seems
that watchers could receive one email for each issue (it could be 500 emails
more or less).
I would recommend you that if you are watching the Aseprite repository, you
unwatched it (at least temporarily) until we do the migration (in a couple of days):
https://github.com/aseprite/aseprite
Sorry for the inconvenience.