refactoring

runtests
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			#!/bin/sh
			for e in ../bin/*; do
			c=$(basename $e);
			if [ -f $c.out ]; then #run only if reference output file exists.
			echo -ne "\n*** Running $c ... "
			temp=$c.$$
			if [ -f $c.in ]; then
			$e < $c.in \| grep -v 'time (s)' \| grep -v 'Memory used' > $temp
			else
			$e \| grep -v 'time (s)' \| grep -v 'Memory used' > $temp
			fi
			diff -w $c.out $temp >/dev/null
			stat=$?
			if [ $stat -eq 1 ]; then
			echo "test failed! ***"
			echo "* Diff of $c.out $temp *"
			diff -w $c.out $temp
			else
			echo "test passed! ***"
			fi
			rm $temp
			fi
			done