busybox/testsuite/unexpand/unexpand-works-like-GNU

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rm -f foo bar
echo " y" | unexpand ../../busybox > foo
echo " y" | busybox unexpand ../../busybox > bar
set +e
test ! -f foo -a -f bar
if [ $? = 0 ] ; then
set -e
diff -q foo bar
fi
rm -f foo bar
echo " y" | unexpand ../../busybox > foo
echo " y" | busybox unexpand ../../busybox > bar
set +e
test ! -f foo -a -f bar
if [ $? = 0 ] ; then
set -e
diff -q foo bar
fi
echo " y y" | unexpand ../../busybox > foo
echo " y y" | busybox unexpand ../../busybox > bar
set +e
test ! -f foo -a -f bar
if [ $? = 0 ] ; then
set -e
diff -q foo bar
fi
rm -f foo bar
echo " y y" | unexpand ../../busybox > foo
echo " y y" | busybox unexpand ../../busybox > bar
set +e
test ! -f foo -a -f bar
if [ $? = 0 ] ; then
set -e
diff -q foo bar
fi
echo " y y" | unexpand -a ../../busybox > foo
echo " y y" | busybox unexpand -a ../../busybox > bar
set +e
test ! -f foo -a -f bar
if [ $? = 0 ] ; then
set -e
diff -q foo bar
fi
rm -f foo bar
echo " y y" | unexpand -a ../../busybox > foo
echo " y y" | busybox unexpand -a ../../busybox > bar
set +e
test ! -f foo -a -f bar
if [ $? = 0 ] ; then
set -e
diff -q foo bar
fi