Synopsis: “RBG” uses archival footage to trace Justice Ruth Bader Ginsburg’s barrier-busting career, following her rise from a brainy Brooklynite to the highest court in the land. It also delves into her relationship with her husband, Martin Ginsburg, and catches the justice in private moments, following her on workouts and with her granddaughter. What emerges is a portrait of a person who used her legal career to fight for women and minorities.