anchor.diff:  % Day of the week, textual, 3 letters; e.g. 'Fri'
   tag_to_value($D, Date, _, Context) ->
      Dow = calendar:day_of_the_week(Date),
  -   string:sub_string(dayname(Dow, Context), 1, 3);
  +   z_string:truncate(dayname(Dow, Context), 3, []);
   
   % Month, textual, long; e.g. 'January'
   tag_to_value($F, {_,M,_}, _, Context) ->
  
positive.code: 
  % Year, 2 digits; e.g. '99'
  tag_to_value($y, {Y, _, _}, _, _Context) ->
     string:sub_string(integer_to_list(Y), 3);
  
  % Year, 4 digits; e.g. '1999'
  tag_to_value($Y, {Y, _, _}, _, _Context) ->
  
negative.code: 
  % Month, textual, 3 letters; e.g. 'Jan'
  tag_to_value($M, {_,M,_}, _, Context) ->
     z_string:truncate(monthname(M, Context), 3, []);
  
  % Month without leading zeros; i.e. '1' to '12'
  tag_to_value($n, {_, M, _}, _, _Context) ->
  