Routine Name:	pope

Description:	Restores previously stacked ("pushed") element as current
		working element.

Usage:		pope

Example:	genesis >  pwe
		/neuron
		genesis >  pushe /somewhereelse
		/somewhereelse
		genesis >  pwe
		/somewhereelse
		genesis >  pope
		/neuron
		genesis >  pwe
		/neuron

Notes:		This routine ("pop element") is analogous to the
		operating-system shell "popd" feature for directories.

See also:	pushe, stack

