In “Spencer,” Kristen Stewart Looks Back to Move Forward

Kristen Stewart as Princess Diana in “Spencer” (Neon Films)

Kristen Stewart’s performance in “Spencer” is a stunning rebuke to the dismissals that greeted her earlier in her career. The off-handed and flinty equations of Stewart’s talent with the ‘Twilight’ phenomenon and its subsequent backlash and the clichéd derision that mistook her once ubiquitous tabloid coverage as proof she was ‘one note’ or coasting on fame — such easy brush-offs were all…