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are S-expression comments really useful?

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If I understand correctly:
is equivalent to:
The difference is that the end of the comment is
implicit by the end of the form.  The only advantage
I see it makes it easier for a programmer to comment
a form in or out without having to find the end of the
S-expression.  But how difficult is this, especially
if you're using an editor that supports S-expressions?

On the other hand, the #:FORM syntax is harder for
humans *reading* the code, since it's not visually
obvious where the comment ends.
	--Per Bothner
per@xxxxxxxxxxx   http://per.bothner.com/