A (perhaps) useful thing to keep in mind.

[Jorge]

It seems that all of these are equally valid ways to say "function ƒ () { ... }" :

function ƒ () { ... }
function ƒ () {{ ... }}
function ƒ () {{{ ... }}}
.. etc.

I think that perhaps it can be used cleverly to hack something useful. For example, a generator instead an asterisk, might require two braces. Or whatever. Just saying.

My 0.02
-- 
Jorge.