def get_chunk(input_string) 
      smaller_string = input_string.slice(0,max_length - PREPEND_COUNT)

      if last_space(smaller_string)
        smaller_string.slice(0,last_space(smaller_string) + 1)
      else
        smaller_string
      end
    end
def get_chunk(input_string) 
      smaller_string = input_string.slice(0,max_length - PREPEND_COUNT)

      if last_space(smaller_string)
        smaller_string.slice(0,last_space(smaller_string) + 1)
      else
        smaller_string
      end
    end
append elipse to end of each chunk
 (...)
140 -5 = text chunk
 can't split up words.
 sting = "likasdlkjhalkd jdlka"
 string[-1] => a
 take the first 140 -5

 check if the last char is /\s/
 if it is save it as a chunk
 else
 (1/8) hsssjhs
 remove all chars after last /\s/
 prepend 1 of 5 , 2 of 5 , ....
string = "cnaoicncnsdj dcndvcsdnuisvbnuisdbsc sducbsidcubsiucbescebuicbscsec"