Hi,
We writing in a comment, you can mention an ISSUE-XXX and it is be default rendered as a link.
But,
- you should know which exact issue ID you want to refer to before. Why wouldn't it be possible to have an auto-complete feature like with '@' mentioning ?
- the issue is renderer as ISSUE-XXX rather as a link displaying "ISSUE-XXX : there is a an issue with X bla bla"
Is there something to do that ?