Fix eclipse warnings.

Author: javadev

src/main/java/com/github/underscore/$.java

@@ -2392,10 +2392,9 @@ public static <T extends Comparable<T>> List<T> sort(final Iterable<T> iterable)
         return localList;
     }
 
-    @SuppressWarnings("unchecked")
     public static <T extends Comparable<T>> T[] sort(final T ... array) {
         final T[] localArray = array.clone();
-        Arrays.<T>sort(localArray);
+        Arrays.sort(localArray);
         return localArray;
     }
 

src/main/java/com/github/underscore/Optional.java

@@ -54,7 +54,7 @@ public boolean isPresent() {
         return !absent;
     }
 
-    public <U> Optional<U> map(Function<? super T, ? extends U> mapper) {
+    public <U> Optional<? extends U> map(Function<? super T, ? extends U> mapper) {
         $.checkNotNull(mapper);
         if (!isPresent()) {
             return absent();