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(groff)End-of-input Traps

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End-of-input Traps
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 - Request: .em macro
     Sets a trap at the end of input.  The MACRO specified is executed
     after the last line of the input file has been processed.

     For example, if the document had to have a section at the bottom
     of the last page for someone to approve it, the `em' request could
     be used.


          .de approval
          .ne 5v
          .sp |(\\n(.t-6v)
          .in +4i
          .lc _
          .br
          Approved:\t\a
          .sp
          Date:\t\t\a
          ..
          .em approval