Code cleanup (#1461)

* Code cleanup

* Fix flux tests

* Fix checkstyle errors

* Fix compile error

fluentinterface/src/main/java/com/iluwatar/fluentinterface/app/App.java

@@ -94,7 +94,7 @@ public class App {
         .filter(positives())
         .first(4)
         .last(2)
-        .map(number -> "String[" + valueOf(number) + "]")
+        .map(number -> "String[" + number + "]")
         .asList();
     prettyPrint("The lazy list contains the last two of the first four positive numbers "
         + "mapped to Strings: ", lastTwoOfFirstFourStringMapped);

fluentinterface/src/main/java/com/iluwatar/fluentinterface/fluentiterable/lazy/LazyFluentIterable.java

@@ -198,7 +198,7 @@ public class LazyFluentIterable<E> implements FluentIterable<E> {
       @Override
       public Iterator<T> iterator() {
         return new DecoratingIterator<T>(null) {
-          Iterator<E> oldTypeIterator = iterable.iterator();
+          final Iterator<E> oldTypeIterator = iterable.iterator();
 
           @Override
           public T computeNext() {