Replace 2x empty lines with a single one

Author: garydgregory

src/test/java/org/apache/commons/lang3/RuntimeEnvironmentTest.java

@@ -30,7 +30,6 @@
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
-
 /**
  * Tests {@link RuntimeEnvironment}.
  */

src/test/java/org/apache/commons/lang3/builder/DiffBuilderTest.java

@@ -38,7 +38,6 @@
  */
 public class DiffBuilderTest extends AbstractLangTest {
 
-
     /**
      * Test fixture.
      */

src/test/java/org/apache/commons/lang3/builder/ReflectionDiffBuilderTest.java

@@ -229,7 +229,6 @@ public void testRetention() throws Exception {
         }
     }
 
-
     @Test
     public void testNoDifferencesDiffExcludeAnnotatedField() {
         final TypeTestClass firstObject = new TypeTestClass();