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exch
The exch
macro (see Arguments) as presented requires clients
to double quote their arguments. A nicer definition, which lets
clients follow the rule of thumb of one level of quoting per level of
parentheses, involves adding quotes in the definition of exch
, as
follows:
define(`exch', ``$2', `$1'') => define(exch(`expansion text', `macro')) => macro =>expansion text