-[ -f "${todir}/referent" ] || test_fail "referent was not copied"
-[ -d "${todir}/from" ] && test_fail "extra level of directories"
-if [ -L "${todir}/dangling" ]
+[ -f "$todir/referent" ] || test_fail "referent was not copied"
+[ -d "$todir/from" ] && test_fail "extra level of directories"
+if is_a_link "$todir/dangling"