Remove warnings on Ruby 2.1

activesupport/lib/active_support/hash_with_indifferent_access.rb

@@ -228,7 +228,11 @@ def deep_symbolize_keys; to_hash.deep_symbolize_keys! end
     def to_options!; self end
 
     def select(*args, &block)
-      dup.tap {|hash| hash.select!(*args, &block)}
+      dup.tap { |hash| hash.select!(*args, &block)}
+    end
+
+    def reject(*args, &block)
+      dup.tap { |hash| hash.reject!(*args, &block)}
     end
 
     # Convert to a regular hash with string keys.

activesupport/lib/active_support/ordered_hash.rb

@@ -28,6 +28,10 @@ def encode_with(coder)
       coder.represent_seq '!omap', map { |k,v| { k => v } }
     end
 
+    def reject(*args, &block)
+      dup.tap { |hash| hash.reject!(*args, &block)}
+    end
+
     def nested_under_indifferent_access
       self
     end