anchor.diff:  *      into a ROOT macro (C++ file).
   *
   *  To use this conversion program (in $ROOTSYS/bin),
  -*        g2root [-f <map_names>] <geant_rzfile> <macro_name>
  +*        g2root [-f <map_names>] <geant_rzfile> <macro_name> [lrecl]
   *  run g2root without parameters to see the usage info.
   *
   *  for example
   *        g2root na49.geom na49.C
   *  will convert the GEANT RZ file na49.geom into a ROOT macro na49.C
  +*
  +*  The default value for lrecl is 1024. The parameter lrecl must be specified
  +*  if the record length of the Zebra file is greater than 1024.
   *
   *  You can use <map_names> file to rename generated TNode's.
   *  See an example of that file in the commented section below.
  
positive.code: *
  **********************************************************************
  
        parameter (nwpaw=1000000)
        common/pawc/paw(nwpaw)
  
        character *80 gname
  
negative.code: *_______________________________________________________________________
        subroutine volume(cname,qjv)
  *KEEP,HCBOOK.
        parameter (nwpaw=2000000)
        common/pawc/paw(nwpaw)
  
        INTEGER   IQ(2), LQ(8000)
  