$newline never
<table>
  <tbody>
    $forall coord <- review liveCoords lLength
      <tr .massinput__cell>
        ^{cellWdgts ! coord}
        <td>
          $maybe delButton <- delButtons !? coord
            ^{fvWidget delButton}
  $maybe addWdgt <- addWdgts !? (0, 0)
    <tfoot>
      <tr .massinput__cell.massinput__cell--add>
        ^{addWdgt}