Wish: Allow comments inside binary values.

[Oldes]

In Red language is already possible to write:

	header: #{
		52454442494E								;-- REDBIN magic
		02											;-- version
		00											;-- placeholder for flags
		00000000									;-- placeholder for length (bytes)
		00000000									;-- placeholder for size (number of root records)
	}

I think it would be useful addition (once Github will update the syntax-colorizer too).