message: Replicate in spite of identical value
  When setting a list element equal to the previous value, it should
  be reflected in the replication log.
diff: @@ -410,10 +410,10 @@ public:
  ensure_writeable();
  do_set(ndx, value);
  m_obj.bump_content_version();
  + }
  if (Replication* repl = this->m_const_obj->get_alloc().get_replication()) {
  set_repl(repl, ndx, value);
  }
  - }
  return old;
  }
  