Displaying a requester

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  This routine displays a requester on the screen with any passed message 
text, (including buttons). 
 
  1dorequest: 
  2  parse arg reqargs 
  3  if newopus then 
  4    lister request handle reqargs 
  5  else 
  6    dopus request reqargs 
  7  return 
 
Line: 
 1      Sub-routine label. 
 2      Parse the arguments for the message text. 
 3 - 6  If we are using an Opus later than 5.1215 then we can use the 
         lister request  command, otherwise we'll use the  dopus request  
        command to display the message text. 
 7      Return from whence we came. 
 

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