docs: def char_spacing(self, dots):
          '''Specifes character spacing in dots.
          
          Args:
              dots: the character spacing you desire, in dots
          Returns:
              None
          Raises:
              RuntimeError: Invalid dot amount.
          '''
          if dots in range(0,127):
              self.send(chr(27)+chr(32)+chr(dots))
          else:
              raise RuntimeError('Invalid dot amount in function charSpacing')