bug#13023: 24.3.50; lexical binding does not work within defadvice

[Richard Stallman]

Correction:

    Yes: complexity.  Compare nadvice.el and advice.el.

The main difference seems to me that part of the arguments of
advice.el get pushed into the function that you need to pass
to advice-add.  So the complexity of using advice-add is no less.
Also, you lose the ability to modify the argument values before
the advised function's body.

The doc string of advice-add is incomplete, so I cannot tell
what all its args mean or what it can really do.

-- 
Dr Richard Stallman
President, Free Software Foundation
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