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COMMENT


 COMMENT commentstring
 and
 COMMENT
 ...one or more lines...
 ENDCOMMENT

 The first form of the COMMENT command is functionally identical to  the
 # command, and allows the insertion  of a single comment line into  the
 input file.  In the  second form, the line  is blank after the  initial
 COMMENT keyword, and all following lines  up to and including the  next
 matching ENDCOMMENT command are treated  as comments.  These lines  may
 contain  COMMENT  commands  and  COMMENT  ...   ENDCOMMENT   sequences,
 provided that these are balanced.  This provides a convenient  facility
 for temporarily causing part of the input to be ignored without  having
 to physically remove it.