message: Eliminate the awkward gap between input outline and accessory
diff: margin-left: -1px;
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  - border-left-color: transparent;
  + border-left-width: 0;
  }
  .boxel-input-group > :not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  - border-right-color: transparent;
  + border-right-width: 0;
  }
  .boxel-input-group__form-control {
  