Sometimes an expression will print output during its execution. You
can indicate the printed output with the @print{} command.
The @print{} command is displayed as `-|' in Info and
as `-|' in the printed output.
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
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