For most of its running, Stronger is a watchable if unremarkable disaster biopic, admirably uncomfortable with terrorist attack cliche. It traces the story of Jeff Bauman, played by Jake Gyllenhaal, had both legs amputated above the knee after being caught in the 2013 bombing of the Boston Marathon, where he was cheering for his on again, off again girlfriend Erin. This is the second film based on the Boston attack released this year, but whereas Peter Berg’s typically muscular Patriot’s Day tracked the manhunt for the bombers, Stronger keeps its focus on personal consequences, John Pollono’s script working off Bauman’s memoir…