tests: missed char in list

'=' also doesn't belong to property name.

test/lib/aux.sh

@@ -1360,7 +1360,7 @@ EOF
 			echo "$s {"
 			local k
 			for k in $(grep ^"$s"/ "$config_values" | cut -f1 -d= | sed -e 's, *$,,' | sort | uniq); do
-				grep "^$k[ =]" "$config_values" | tail -n 1 | sed -e "s,^$s/,	 ," || true
+				grep "^$k[ \t=]" "$config_values" | tail -n 1 | sed -e "s,^$s/,	 ," || true
 			done
 			echo "}"
 			echo