[REMOVE] Introduce new API error/warning.

Author: HannesWell

bundles/org.eclipse.e4.core.commands/src/org/eclipse/e4/core/commands/EHandlerService.java

@@ -69,6 +69,9 @@
  */
 public interface EHandlerService {
 
+	default void doSomething() {
+	}
+
 	/**
 	 * Makes the passed <code>handler</code> active for the command with the passed
 	 * <code>commandId</code>.

bundles/org.eclipse.e4.core.commands/src/org/eclipse/e4/core/commands/ExpressionContext.java

@@ -26,6 +26,8 @@
  * @noextend This class is not intended to be subclassed by clients.
  */
 public class ExpressionContext implements IEvaluationContext {
+	// Some remark
+
 	/**
 	 * See org.eclipse.e4.ui.services.IServiceConstants.ACTIVE_SELECTION
 	 */