anchor.diff:  
   community_set_stanza
   :
  -   COMMUNITY_SET name = variable NEWLINE community_set_elem_list END_SET NEWLINE
  +   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 COMMA NEWLINE
  +   )* community_set_elem NEWLINE
   ;
   
   community_set_elem
  
positive.code: prefix_set_elem_list
  :
     | // no elements
     | (prefix_set_elem COMMA NEWLINE)* prefix_set_elem NEWLINE
  ;
  
  prefix_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
  