From
http://wiki.tcl-lang.org/14
Description/Definition
Items needing a description/definition can be specified as 3 spaces,
some text, a colon, 3 or more spaces, and the description:
item ''needing'' '''description''': the '''description''' the item ''needed''
Will be rendered as:
item needing description
the description the item needed
Contemplate on what happens when the "some text" portion is empty.