(m4.info)Quoted strings

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3.2 Quoting input to `m4'

A quoted string is a sequence of characters surrounded by quote
strings, defaulting to ``' and `'', where the nested begin and end
quotes within the string are balanced.  The value of a string token is
the text, with one level of quotes stripped off.  Thus


is the empty string, and double-quoting turns into single-quoting.


   The quote characters can be changed at any time, using the builtin
macro `changequote'.  Note: Changequote, for more information.

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