Cannot declare object literal properties with unquoted reserved words

[bitwiseman]

As noted in #439, we still don't quite handle reserved words correctly.
When declaring object literals (from #309):

var a = { 'throw': function() {} }; // Success!
var b = { throw: function() {} }; // Failure!

This is a lesser issue than promise.throw() not formatting correctly, but it is still worth looking into. Made difficult by #200.