def is_well_formatted(self):
        """Checks if string is good formatted
    
        :return: True iff string is good formatted
        """
        # False iff there are at least \n, \r, \t,"  "
        is_bad_formatted = ":" in self.string or \
                           "\\'" in self.string or \
                           "\n" in self.string or \
                           "\r" in self.string or \
                           "\t" in self.string or \
                           "\\n" in self.string or \
                           "\\r" in self.string or \
                           "\\t" in self.string or \
                           "  " in self.string
        return not is_bad_formatted