TORONTO - With more than 60 documentaries under his belt and nearly as many high-profile interviews to his name, filmmaker Barry Avrich said chronicling the career of Justice Rosalie Silberman Abella was by far his most nerve-racking experience yet. “I don’t have any training in law and here I am about to have a conversation with somebody who is so extraordinarily smart,” Avrich said in a video call. “With Rosalie Abella, she’s in a league of her own in terms of law and injustice, which was a completely foreign experience for me.” His latest documentary, “Without Precedent: The Supreme Life...