SONARJAVA-5436 Suggest to add comment in message for S108 (#5124)

Author: romainbrenguier

java-checks/src/main/java/org/sonar/java/checks/EmptyBlockCheck.java

@@ -30,7 +30,7 @@
 @Rule(key = "S108")
 public class EmptyBlockCheck extends IssuableSubscriptionVisitor {
 
-  private static final String MESSAGE = "Either remove or fill this block of code.";
+  private static final String MESSAGE = "Remove this block of code, fill it in, or add a comment explaining why it is empty.";
   private boolean isMethodBlock;
 
   @Override

java-checks/src/test/files/checks/EmptyBlock.java

@@ -42,7 +42,7 @@ void method() {
     }
 
 
-    switch (1) { // Noncompliant {{Either remove or fill this block of code.}}
+    switch (1) { // Noncompliant {{Remove this block of code, fill it in, or add a comment explaining why it is empty.}}
 //             ^
     }