#315. Forgot to add this

Author: pitbulk

lib/xml_security.rb

@@ -50,7 +50,8 @@ def canon_algorithm(element)
       case algorithm
         when "http://www.w3.org/TR/2001/REC-xml-c14n-20010315",
              "http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments" then Nokogiri::XML::XML_C14N_1_0
-        when "http://www.w3.org/2006/12/xml-c14n11"                         then Nokogiri::XML::XML_C14N_1_1
+        when "http://www.w3.org/2006/12/xml-c14n11",
+             "http://www.w3.org/2006/12/xml-c14n11#WithComments"            then Nokogiri::XML::XML_C14N_1_1
         else                                                                     Nokogiri::XML::XML_C14N_EXCLUSIVE_1_0
       end
     end

test/xml_security_test.rb

@@ -102,6 +102,7 @@ class XmlSecurityTest < Minitest::Test
     it "XML_C14N_1_1" do
       canon_algorithm = Nokogiri::XML::XML_C14N_1_1
       assert_equal canon_algorithm, XMLSecurity::BaseDocument.new.canon_algorithm("http://www.w3.org/2006/12/xml-c14n11")
+      assert_equal canon_algorithm, XMLSecurity::BaseDocument.new.canon_algorithm("http://www.w3.org/2006/12/xml-c14n11#WithComments")
     end
   end