Checkbox in wiki syntax
When you create an issue with multiple subtask in it (I'm talking about a list of things to do in a ticket. Not link to other tickets).
It would be great to be able to put checkbox in front of each subtask in it. you could then check the checkbox when the subtask is complete as the issue evolves.
Like this :
[ ] or this  for unchecked checkbox
[*] or this [x] for a checked checkbox
Task number one to do
Task number two complete
task number three to do
task number four complete
task number five complete