anchor.diff:  standard_access_list_tail
   :
      (
  -      SEQ? num=DEC
  +      SEQ? num = DEC
      )? ala = access_list_action ipr = access_list_ip_range LOG? NEWLINE
   ;
   
  
positive.code: 
  community_set_stanza
  :
     COMMUNITY_SET name = variable NEWLINE community_set_elem_list END_SET NEWLINE
  ;
  
  community_set_elem_list
  :
     (community_set_elem COMMA NEWLINE)* community_set_elem NEWLINE
  ;
  
  community_set_elem
  
negative.code: :
     (
        SEQ? DEC
     )? ala = access_list_action prot = protocol srcipr = access_list_ip_range
     (
        alps_src = port_specifier
     )? dstipr = access_list_ip_range
  