How to reference a user who has a space in his user name?

This has kinda been puzzling me for a time now.

Some users have a space in their name. When you hover over their user name, and look at the status bar in your browser you will see the space has been replaced by a dash, and to add to confusion the characters are all lower case. So how to reference someone? I tried adding the dash myself by you'll just get that '@ --' thingy in your post.

Thanks.

So yeah, obviously, you just use this icon:

to insert the code, then type the username as it appears on the forum. Can't believe I just discovered that 10 minutes later.

You use put the user name inside [ ]