anchor.diff:  
   inform_dist_free(dist);
   ----
  +[horizontal]
  +Header::
  +    `inform/dist.h`
   ****
   
   ****
  
positive.code: assert(inform_dist_size(dist) == 5);
  inform_dist_free(dist);
  ----
  ****
  
  ****
  
negative.code: // dist->histogram ~ {0,0}
  inform_dist_free(dist);
  ----
  [horizontal]
  Header::
      `inform/dist.h`
  ****
  
  ****
  