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: standard_access_list_tail
  :
     (
        SEQ? num=DEC
     )? ala = access_list_action ipr = access_list_ip_range LOG? NEWLINE
  ;
  
  
negative.code: prefix_set_elem_list
  :
     | // no elements
  
     |
     (
        prefix_set_elem COMMA NEWLINE
     )* prefix_set_elem NEWLINE
  ;
  
  prefix_set_elem
  