If the useful improvements can be removed without damage to the principal thing, the possessor in good faith may remove them, unless the person who recovers the possession exercises the option under paragraph 2 of the preceding article. (n) ARTICLE 548. Expenses for pure luxury or mere pleasure shall not be refunded to the possessor in good faith; but he may remove the ornaments with which he has embellished the principal thing if it suffers no injury thereby, and if his successor in the possession does not prefer to refund the amount expended. (454)