Macro for commenting out code

[catamorphism]

Since nested comments aren't allowed, there's no easy way to comment out code that has comments in it. This seems like the simplest possible macro :-)

[bblum]

waah when did we lose nested comments? :(

[graydon]

@bblum A while back. They made the lexical grammar non-regular. Not worth price.

@catamorphism the ignore! macro is in already; needs to be modified to be item-able, but it does work. Closing this as .. a bit-of-a-dupe.