function warn(info, add, place) {
      if (add === 0) return
      file.message(
        'Unexpected unaligned cell, expected aligned pipes, add `' +
          add +
          '` ' +
          pluralize('space', add) +
          (info.row === undefined
            ? ' (or add `-` to pad alignment row cells)'
            : ''),
        {ancestors: info.ancestors, place}
      )
    }
@param {Entry} info
  Info.
@param {number} add
  Number of spaces to add.
@param {Point} place
  Place to add spaces.
@returns {undefined}
  Nothing.