cleanup.rb in metanorma-standoc-1.5.3

- old
+ new

@@ -7,9 +7,10 @@
 require_relative "./cleanup_ref.rb"
 require_relative "./cleanup_boilerplate.rb"
 require_relative "./cleanup_section.rb"
 require_relative "./cleanup_terms.rb"
 require_relative "./cleanup_inline.rb"
+require_relative "./cleanup_amend.rb"
 require "relaton_iev"
 
 module Asciidoctor
   module Standoc
     module Cleanup