( Quoting Arguments

Info Catalog ( Macro Arguments ( Macros ( Macro expansion
 3.4 On Quoting Arguments to macros
 Each argument has leading unquoted whitespace removed.  Within each
 argument, all unquoted parentheses must match.  For example, if FOO is
 a macro,
      foo(() (`(') `(')
 is a macro call, with one argument, whose value is `() (() ('.  Commas
 separate arguments, except when they occur inside quotes, comments, or
 unquoted parentheses,  Pseudo Arguments, for examples.
    It is common practice to quote all arguments to macros, unless you
 are sure you want the arguments expanded.  Thus, in the above example
 with the parentheses, the `right' way to do it is like this:
      foo(`() (() (')
    It is, however, in certain cases necessary or convenient to leave out
 quotes for some arguments, and there is nothing wrong in doing it.  It
 just makes life a bit harder, if you are not careful.  For consistency,
 this manual follows the rule of thumb that each layer of parentheses
 introduces another layer of single quoting, except when showing the
 consequences of quoting rules.  This is done even when the quoted string
 cannot be a macro, such as with integers when you have not changed the
 syntax via `changeword' ( Changeword).
Info Catalog ( Macro Arguments ( Macros ( Macro expansion
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