Move tag_attributes merge to rb file

Author: lumisce

app/concepts/matestack/ui/core/ins/ins.haml

@@ -1,4 +1,4 @@
-%ins{@tag_attributes.merge({:cite => options[:cite], :datetime => options[:datetime]})}
+%ins{@tag_attributes}
   - if options[:text].nil? && block_given?
     = yield
   - else

app/concepts/matestack/ui/core/ins/ins.rb

@@ -1,5 +1,9 @@
 module Matestack::Ui::Core::Ins
   class Ins < Matestack::Ui::Core::Component::Static
-
+    def setup
+      @tag_attributes.merge!({
+        cite: options[:cite],
+        datetime: options[:datetime]
+      })
   end
 end