cleanup

jps/jps-builders/src/org/jetbrains/jps/incremental/LineOutputWriter.java

@@ -128,7 +128,7 @@ public abstract class LineOutputWriter extends Writer {
       return false;
     }
 
-    public boolean hasData() {
+    boolean hasData() {
       return myData.length() > 0;
     }
 

platform/util/src/com/intellij/util/text/MergingCharSequence.java

@@ -50,6 +50,6 @@ public class MergingCharSequence implements CharSequence {
   @Override
   @NotNull
   public String toString() {
-    return s1.toString() + s2.toString();
+    return s1 + s2.toString();
   }
 }