MinimumLengthValidator.get_error_message has a bug that breaks translation

[meng]

Hello,
The get_error_message method of the MinimumLengthValidator class in Django's auth password_validation.py file has a bug that prevents translations from working correctly.

The problem code is：

class MinimumLengthValidator:
    ...
    def get_error_message(self):
        return (
            ngettext(
                "This password is too short. It must contain at least %d character.",
                "This password is too short. It must contain at least %d characters.",
                self.min_length,
            )
            % self.min_length
        )

The correct code should be：

class MinimumLengthValidator:
    ...
    def get_error_message(self):
        return (
            ngettext(
                "This password is too short. It must contain at least %(min_length)d character.",
                "This password is too short. It must contain at least %(min_length)d characters.",
                self.min_length,
            )
            % {"min_length": self.min_length}
        )