Remove double and triple blank lines

src/test/java/net/openhft/chronicle/map/CHMUseCasesTest.java

@@ -477,7 +477,6 @@ public class CHMUseCasesTest {
 
             assertBBEquals(ByteBuffer.wrap(new byte[]{12, 10, 11, 11}), map.get(key1));
 
-
             map.put(key1, value1);
             map.put(key2, value2);
             ByteBuffer valueA = ByteBuffer.allocateDirect(8);
@@ -500,7 +499,6 @@ public class CHMUseCasesTest {
                 assertBBEquals(value2, valueB);
             }
 
-
             try (WriteContext wc = map.acquireUsingLocked(key1, valueA)) {
                 assertBBEquals(value1, valueA);
                 appendMode(valueA);
@@ -591,7 +589,6 @@ public class CHMUseCasesTest {
         }
     }
 
-
     private void assertBBEquals(ByteBuffer bb1, ByteBuffer bb2) {
         assertEquals(bb1.remaining(), bb2.remaining());
         for (int i = 0; i < bb1.remaining(); i++)
@@ -1421,7 +1418,6 @@ public class CHMUseCasesTest {
 
     }
 
-
     @Test
     public void testListValue() {
         try (ChronicleMap<String, List<String>> map = ChronicleMapBuilder