message: extend cancellation test
diff: @@ -104,7 +104,8 @@ fn no_back_dating_in_cancellation() {
  });
  db.wait_for(1);
  - // Set unrelated input to bumpision rev
  +
  + // Set unrelated input to bump revision
  db.query_mut(Input).set('b', 2);
  // Here we should recompuet the whole chain again, clearing the cancellation
  @@ -112,4 +113,8 @@ fn no_back_dating_in_cancellation() {
  assert_eq!(db.sum3("a"), 1);
  assert_eq!(thread1.join().unwrap(), std::usize::MAX);
  +
  + db.query_mut(Input).set('a', 3);
  + db.query_mut(Input).set('a', 4);
  + assert_eq!(db.sum3("ab"), 6);
  }
  