Update lib/rails/dom/testing/assertions/selector_assertions.rb

Co-authored-by: Rafael Mendonça França <[email protected]>

Author: ghiculescu

lib/rails/dom/testing/assertions/selector_assertions.rb

@@ -297,7 +297,7 @@ def nodeset(node)
             if node.is_a?(Nokogiri::XML::NodeSet)
               node
             else
-              node ||= Nokogiri::HTML::Document.parse("")
+              node ||= Nokogiri::HTML::Document.new
               Nokogiri::XML::NodeSet.new(node.document, [node])
             end
           end