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─────Programmer's WorkBench─────────────────────────────────────────────────
 
     _pwbundo := cancel undo <
 
     Cancel    Establishes a uniform "ground state" by canceling any
               selection or argument.
 
     Undo      Reverse the last modification.
 
     <         Restores the function's prompt (if any). By default,
               function prompts are suppressed while a macro is
               running.
 
     See
 
     Cancel
     ◄Edit menu, Redo►
     ◄Edit menu, Undo►
                                    -♦-