code: def standardise_quotes(self, val):
          
          if self._in_quotes(val, self.altquote):
              middle = self.remove_quotes(val)
              val = self.add_quotes(middle)
  
          return self.escape_quotes(val)
docs: Change the quotes used to wrap a value to the pprint default
          E.g. "val" to 'val' or 'val' to "val"