fix tests

activesupport/test/core_ext/hash_ext_test.rb

@@ -505,7 +505,7 @@ def test_one_level_with_nils
     assert_equal "<person>", xml.first(8)
     assert xml.include?(%(<street>Paulina</street>))
     assert xml.include?(%(<name>David</name>))
-    assert_includes xml, %(<age nil="true"></age>)
+    assert_includes xml, %(<age nil="true"/>)
   end
 
   def test_one_level_with_skipping_types
@@ -513,7 +513,7 @@ def test_one_level_with_skipping_types
     assert_equal "<person>", xml.first(8)
     assert xml.include?(%(<street>Paulina</street>))
     assert xml.include?(%(<name>David</name>))
-    assert_includes xml, %(<age nil="true"></age>)
+    assert_includes xml, %(<age nil="true"/>)
   end
 
   def test_one_level_with_yielding
@@ -618,12 +618,12 @@ def test_single_record_from_xml_with_nil_values
     EOT
 
     expected_topic_hash = {
-      :title      => nil, 
+      :title      => nil,
       :id         => nil,
       :approved   => nil,
       :written_on => nil,
       :viewed_at  => nil,
-      :content    => nil, 
+      :content    => nil,
       :parent_id  => nil
     }.stringify_keys
 
@@ -701,7 +701,7 @@ def test_single_record_from_xml_with_attributes_other_than_type
 
     assert_equal expected_topic_hash, Hash.from_xml(topic_xml)["rsp"]["photos"]["photo"]
   end
-  
+
   def test_empty_array_from_xml
     blog_xml = <<-XML
       <blog>
@@ -815,13 +815,13 @@ def test_xsd_like_types_from_xml
 
     assert_equal expected_bacon_hash, Hash.from_xml(bacon_xml)["bacon"]
   end
-  
+
   def test_type_trickles_through_when_unknown
     product_xml = <<-EOT
     <product>
       <weight type="double">0.5</weight>
       <image type="ProductImage"><filename>image.gif</filename></image>
-      
+
     </product>
     EOT
 
@@ -830,7 +830,7 @@ def test_type_trickles_through_when_unknown
       :image => {'type' => 'ProductImage', 'filename' => 'image.gif' },
     }.stringify_keys
 
-    assert_equal expected_product_hash, Hash.from_xml(product_xml)["product"]    
+    assert_equal expected_product_hash, Hash.from_xml(product_xml)["product"]
   end
 
   def test_should_use_default_value_for_unknown_key
@@ -864,41 +864,41 @@ def test_kernel_method_names_to_xml
       assert_equal expected, hash.to_xml(@xml_options)
     end
   end
-  
-  def test_empty_string_works_for_typecast_xml_value    
+
+  def test_empty_string_works_for_typecast_xml_value
     assert_nothing_raised do
       Hash.__send__(:typecast_xml_value, "")
     end
   end
-  
+
   def test_escaping_to_xml
-    hash = { 
-      :bare_string        => 'First & Last Name', 
+    hash = {
+      :bare_string        => 'First & Last Name',
       :pre_escaped_string => 'First &amp; Last Name'
     }.stringify_keys
-    
+
     expected_xml = '<person><bare-string>First &amp; Last Name</bare-string><pre-escaped-string>First &amp;amp; Last Name</pre-escaped-string></person>'
     assert_equal expected_xml, hash.to_xml(@xml_options)
   end
-  
+
   def test_unescaping_from_xml
     xml_string = '<person><bare-string>First &amp; Last Name</bare-string><pre-escaped-string>First &amp;amp; Last Name</pre-escaped-string></person>'
-    expected_hash = { 
-      :bare_string        => 'First & Last Name', 
+    expected_hash = {
+      :bare_string        => 'First & Last Name',
       :pre_escaped_string => 'First &amp; Last Name'
     }.stringify_keys
     assert_equal expected_hash, Hash.from_xml(xml_string)['person']
   end
-  
+
   def test_roundtrip_to_xml_from_xml
-    hash = { 
-      :bare_string        => 'First & Last Name', 
+    hash = {
+      :bare_string        => 'First & Last Name',
       :pre_escaped_string => 'First &amp; Last Name'
     }.stringify_keys
 
     assert_equal hash, Hash.from_xml(hash.to_xml(@xml_options))['person']
   end
-  
+
   def test_to_xml_dups_options
     options = {:skip_instruct => true}
     {}.to_xml(options)
@@ -916,7 +916,7 @@ def test_datetime_xml_type_with_utc_time
     assert alert_at.utc?
     assert_equal Time.utc(2008, 2, 10, 15, 30, 45), alert_at
   end
-  
+
   def test_datetime_xml_type_with_non_utc_time
     alert_xml = <<-XML
       <alert>
@@ -927,7 +927,7 @@ def test_datetime_xml_type_with_non_utc_time
     assert alert_at.utc?
     assert_equal Time.utc(2008, 2, 10, 15, 30, 45), alert_at
   end
-  
+
   def test_datetime_xml_type_with_far_future_date
     alert_xml = <<-XML
       <alert>