         Parameters:  [save-buffer# {1}]
  
 restores the last changed or deleted line over the current line.
 Up  to  7  modifications  may  be  reversed  by  specifying  the
 "save-buffer#" as  1  to  7  ("1"  refers  to  the  most  recent
 modification).   The  current  line  will  be  swapped  with the
 contents of the specified buffer. 
  
 If multiple lines were changed, only the last  7  changed  lines
 are saved.    If  multiple  lines  were  deleted, only the first
 deleted line is saved. 
