The default quote delimiters can be changed with the builtin
changequote:
changequote(opt start, opt end)
where start is the new start-quote delimiter and end is the
new end-quote delimiter. If any of the arguments are missing, the default
quotes (` and ') are used instead of the void arguments.
The expansion of changequote is void.
changequote([, ]) => define([foo], [Macro [foo].]) => foo =>Macro foo.
If no single character is appropriate, start and end can be of any length.
changequote([[, ]]) => define([[foo]], [[Macro [[[foo]]].]]) => foo =>Macro [foo].
Changing the quotes to the empty strings will effectively disable the quoting mechanism, leaving no way to quote text.
define(`foo', `Macro `FOO'.') => changequote(, ) => foo =>Macro `FOO'. `foo' =>`Macro `FOO'.'
There is no way in m4 to quote a string containing an unmatched
left quote, except using changequote to change the current
quotes.
Neither quote string should start with a letter or `_' (underscore), as they will be confused with names in the input. Doing so disables the quoting mechanism.
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