NEWS: Fix the example of Lazy#eager

NEWS

@@ -252,13 +252,9 @@ Enumerator::
       from a lazy enumerator.  [Feature #15901]
 
         a = %w(foo bar baz)
-        e = a.lazy
-             .map {|x| p [x, :upcase]; x.upcase }
-             .map {|x| p [x, :add_bang]; x + "!" }
-             .eager
-        p e.next #=> ["foo", :upcase], ["FOO", :add_bang], "FOO!"
-        p e.next #=> ["bar", :upcase], ["BAR", :add_bang], "BAR!"
-        p e.next #=> ["baz", :upcase], ["BAZ", :add_bang], "BAZ!"
+        e = a.lazy.map {|x| x.upcase }.map {|x| x + "!" }.eager
+        p e.class               #=> Enumerator
+        p e.map {|x| x + "?" }  #=> ["FOO!?", "BAR!?", "BAZ!?"]
 
     * Added Enumerator::Yielder#to_proc so that a Yielder object
       can be directly passed to another method as a block