texinfo: @print

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@error

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14.8.4 '@print{}' (-|): Indicating Generated Output
---------------------------------------------------

Sometimes an expression will generate output during its execution.  You
can indicate such displayed output with the '@print{}' command.

  The '@print{}' command is displayed as '-|', either a horizontal dash
butting against a vertical bar or (when that is not available) the ASCII
sequence '-|'.

  In the following example, the printed text is indicated with '-|', and
the value of the expression follows on the last line.

     (progn (print 'foo) (print 'bar))
         -| foo
         -| bar
         => bar

In a Texinfo source file, this example is written as follows:

     @lisp
     (progn (print 'foo) (print 'bar))
         @print{} foo
         @print{} bar
         @result{} bar
     @end lisp