def truncate(truncate_at = DEFAULT_LENGTH, options = {})
      if display_width(text) <= truncate_at.to_i || truncate_at.to_i.zero?
        return text.dup
      end
      trail      = options.fetch(:trailing) { trailing }
      separation = options.fetch(:separator) { separator }
      width      = display_width(text)
      sanitized_text = Sanitizer.sanitize(text)

      return text if width <= truncate_at

      length_without_trailing = truncate_at - display_width(trail)
      chars = to_chars(sanitized_text).to_a
      stop  = chars[0, length_without_trailing].rindex(separation)
      slice_length = stop || length_without_trailing
      sliced_chars = chars[0, slice_length]
      original_chars = to_chars(text).to_a[0, 3 * slice_length]
      shorten(original_chars, sliced_chars, length_without_trailing).join + trail
    end
def truncate(truncate_at = DEFAULT_LENGTH, options = {})
      if display_width(text) <= truncate_at.to_i || truncate_at.to_i.zero?
        return text.dup
      end
      trail      = options.fetch(:trailing) { trailing }
      separation = options.fetch(:separator) { separator }
      width      = display_width(text)
      sanitized_text = Sanitizer.sanitize(text)

      return text if width <= truncate_at

      length_without_trailing = truncate_at - display_width(trail)
      chars = to_chars(sanitized_text).to_a
      stop  = chars[0, length_without_trailing].rindex(separation)
      slice_length = stop || length_without_trailing
      sliced_chars = chars[0, slice_length]
      original_chars = to_chars(text).to_a[0, 3 * slice_length]
      shorten(original_chars, sliced_chars, length_without_trailing).join + trail
    end
Truncate a text at a given length (defualts to 30)

 @example
   truncation = Verse::Truncation.new
     "The sovereignest thing on earth is parmacetti for an inward bruise."

   truncation.truncate
   # => "The sovereignest thing on ear…"

   truncate(20)
   # => "The sovereignest th…"

   truncate(20, separator: ' ' )
   # => "The sovereignest…"

   truncate(40, trailing: '... (see more)' )
   # => "The sovereignest thing on... (see more)"

 @api public