This solid documentary approaches its subject, supreme court justice and liberal idol Ruth Bader Ginsburg, with much the same calm eloquence that Bader Ginsburg has brought to her judgments over her career. It’s not a showy piece of film-making, but then this indomitable 85-year-old is not an ostentatious person. The film tells her life story, capturing something of the impact of this impeccably polite feminist pioneer – she’s a Halloween costume, a face on a mug, a folk hero for the generations of women who came after her. It’s a timely release – the remarkable Bader Ginsburg was recently in the news having voted against Trump’s proposed asylum restrictions from her hospital bed, following surgery to remove cancerous nodules from her left lung.