code: function dropLowestIndents(
  values)
  {
    let [strings, indents] = values;
    let set = new Set(indents);
    let lowest = Math.min(...indents);
  
    set.delete(lowest);
  
    return [strings, Array.from(set)];
  }
docs: A `postWork` functor for use with `measureIndents` that will modify the
  indents array to be an array missing its lowest number.
  
  @param {[Array<string>, Array<number>]} values the tuple containing the
  modified strings and indent values
  @return {[Array<string>, Array<number>]} returns a tuple containing an
  unmodified set of strings and a modified indents array missing the lowest
  number in the list