HistMove

HistMove = Yes | NO:  If set to Yes, a recalled line is moved to the end 
of the command history.  The difference between this directive and 
HistCopy, is that HistCopy = Yes copies each recalled line to the end of 
the history but leaves the original in place.  HistMove = Yes places the 
line at the end of history and removes the original line. 

This directive has no effect if HistCopy = Yes.