Clarity Regarding The Pius XII “Turkey” Indult
Whether this rumor is accurate makes no difference, because the rules for Friday abstinence were changed in the 1960s.
Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”