@equiv{} (==): Indicating Equivalence
Sometimes two expressions produce identical results.  You can indicate the
exact equivalence of two forms with the @equiv{} command.
  
Thus,
     @lisp
     (make-sparse-keymap) @equiv{} (list 'keymap)
     @end lisp
     
produces
     (make-sparse-keymap) == (list 'keymap)
     
This indicates that evaluating (make-sparse-keymap) produces
identical results to evaluating (list 'keymap).