Arisa closes reports without a description with wrong comment

[tryashtar]

When a reports are created without a description, Arisa closes it as incomplete. However, the posted comment always tells the user to attach a crash report, even if no crash is mentioned.

See for example MC-118029. While it would be nice if the user elaborated a bit in the description, the issue should not have been closed with a message asking the user to attach a crash report.