clean up per code review

Author: lostapathy

lib/roxml.rb

@@ -42,7 +42,9 @@ def to_xml(params = {})
             ref.update_xml(root, value)
           end
         end
-        params[:namespaces].each { |prefix, url| root.add_namespace_definition(prefix, url) } if params[:namespaces]
+        if params[:namespaces]
+          params[:namespaces].each { |prefix, url| root.add_namespace_definition(prefix, url) }
+        end
       end
     end
   end

spec/xml/namespace_spec.rb

@@ -50,7 +50,6 @@ class VApp
     describe "#to_xml" do
       it "should reproduce the input xml" do
         output = ROXML::XML::Document.new
-        namespaces = {'vmw' => "http://foo.example.com", 'gronk' => "http://gronk.example.com"}
         output.root = VApp.from_xml(@xml).to_xml(:namespaces => {'vmw' => "http://foo.example.com", 'gronk' => "http://gronk.example.com"})
         expect(ROXML::XML.parse_string(output.to_s)).to be_equivalent_to(ROXML::XML.parse_string(@xml))
       end