Where in a petition by a husband for dissolution of marriage allegations are made of the respondent’s adultery with a person unknown, but the petitioner fails to comply with certain provisions of sec. 78 of the Marriage Act 1890(a) , the Court will not dismiss the petition, even although the pleadings in the suit are closed, but will prevent the suit from being listed for trial until the petitioner either complies with the section or amends the petition by striking out all reference therein to the alleged unknown adulterer.