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 2 Lexical and syntactic conventions
 ***********************************
 
 As `m4' reads its input, it separates it into "tokens".  A token is
 either a name, a quoted string, or any single character, that is not a
 part of either a name or a string.  Input to `m4' can also contain
 comments.  GNU `m4' does not yet understand locales; all operations are
 byte-oriented rather than character-oriented.  However, `m4' is
 eight-bit clean, so you can use non-ASCII characters in quoted strings
 ( Changequote), comments ( Changecom), and macro names
 ( Indir), with the exception of the NUL character (the zero byte
 `'\0'').
 

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* Names                       Macro names
* Quoted strings              Quoting input to `m4'
* Comments                    Comments in `m4' input
* Other tokens                Other kinds of input tokens
* Input processing            How `m4' copies input to output
 

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