Fix HashWithIndifferentAccess#without bug

activesupport/CHANGELOG.md

+*   Fix bug where `#without` for `ActiveSupport::HashWithIndifferentAccess` would fail
+    with symbol arguments
+
+    *Abraham Chan*
+
 *   Treat `#delete_prefix`, `#delete_suffix` and `#unicode_normalize` results as non-`html_safe`.
     Ensure safety of arguments for `#insert`, `#[]=` and `#replace` calls on `html_safe` Strings.
 

activesupport/lib/active_support/hash_with_indifferent_access.rb

@@ -279,6 +279,8 @@ def delete(key)
       super(convert_key(key))
     end
 
+    alias_method :without, :except
+
     def stringify_keys!; self end
     def deep_stringify_keys!; self end
     def stringify_keys; dup end

activesupport/test/hash_with_indifferent_access_test.rb

@@ -672,6 +672,17 @@ def test_indifferent_slice_access_with_symbols
     assert_equal "bender", slice["login"]
   end
 
+  def test_indifferent_without
+    original = { a: "x", b: "y", c: 10 }.with_indifferent_access
+    expected = { c: 10 }.with_indifferent_access
+
+    [["a", "b"], [:a, :b]].each do |keys|
+      # Should return a new hash without the given keys.
+      assert_equal expected, original.without(*keys), keys.inspect
+      assert_not_equal expected, original
+    end
+  end
+
   def test_indifferent_extract
     original = { :a => 1, "b" => 2, :c => 3, "d" => 4 }.with_indifferent_access
     expected = { a: 1, b: 2 }.with_indifferent_access