Use final

Author: garydgregory

src/main/java/org/apache/commons/collections4/iterators/IteratorChain.java

@@ -175,7 +175,7 @@ public void addIterator(final Iterator<? extends E> iterator) {
                 // in case it is an IteratorChain, wrap every underlying iterators as unmodifiable
                 // multiple rechainings would otherwise lead to exponential growing number of function calls
                 // when the iteratorChain gets used.
-                for (Iterator<? extends E> nestedIterator : ((IteratorChain<? extends E>) underlyingIterator).iteratorQueue) {
+                for (final Iterator<? extends E> nestedIterator : ((IteratorChain<? extends E>) underlyingIterator).iteratorQueue) {
                     iteratorQueue.add(UnmodifiableIterator.unmodifiableIterator(nestedIterator));
                 }
             } else {