Run all physical checks on a raw input line.

def check_physical(self, line):
        """
        Run all physical checks on a raw input line.
        """
        self.physical_line = line
        if self.indent_char is None and len(line) and line[0] in ' \t':
            self.indent_char = line[0]
        for name, check, argument_names in self.physical_checks:
            result = self.run_check(check, argument_names)
            if result is not None:
                offset, text = result
                self.report_error(self.line_number, offset, text, check)