How about using it for noting that some command options and modifiers should be passed to a command as one parameter. For example with DTrace we have to put a lot of things into one parameter (see the -n flag for example).
Currently: [-n [[[provider:] module:] function:] name [[predicate] action]]
Could be: "[-n [[[provider:] module:] function:] name [[predicate] action]]"
When should we use Sq?
Should we put arguments in Ao and Ac (angle brackets)?
How should we format examples the EXAMPLES section?