change code fmt

Author: yangsen

src/test/java/com/qiniu/storage/RegionTest.java

@@ -9,10 +9,12 @@
 
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
+
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;