d_length: minimum characters before which a word is
  dropped, requires whole word if **None**
:param int min_crop: minimum characters that must be dropped if a word is
  cropped
:param Ending ending: type of ending used when truncating, no special
  truncation is used if **None**
:param bool get_remainder: returns a tuple with the second part being the
  cropped portion of the message

:returns: **str** of the text truncated to the given length
r8