code: def from_short_lines_text(self, text: str):
          
          self.text = text
          self.short_lines = [ShortLine(line) for line in text.split("\n") if line]
          self.long_lines = [self.short_lines[2*i:2*i+2] for i in range(int(floor(len(self.short_lines)/2)))]
docs: Famous example from Völsupá 1
          >>> text = "Hljóðs bið ek allar\\nhelgar kindir,\\nmeiri ok minni\\nmögu Heimdallar;\\nviltu at ek, Valföðr,\\nvel fyr telja\\nforn spjöll fira,\\nþau er fremst of man."
          >>> fo = Fornyrdhislag()
          >>> fo.from_short_lines_text(text)
          >>> [sl.text for sl in fo.short_lines]
          ['Hljóðs bið ek allar', 'helgar kindir,', 'meiri ok minni', 'mögu Heimdallar;', 'viltu at ek, Valföðr,', 'vel fyr telja', 'forn spjöll fira,', 'þau er fremst of man.']
          >>> [[sl.text for sl in long_line] for long_line in fo.long_lines]
          [['Hljóðs bið ek allar', 'helgar kindir,'], ['meiri ok minni', 'mögu Heimdallar;'], ['viltu at ek, Valföðr,', 'vel fyr telja'], ['forn spjöll fira,', 'þau er fremst of man.']]
  
          :param text:
          :return: