A Bollywood sports biopic that gets nearly all its moves absolutely right, Dangal draws its strength from a blindingly luminous lead performance from a shape-shifting Aamir Khan. But over and above his physical transformation, compete with wobbly gait and scraggly stubble, so impressively measured is the actor in the guise of national wrestling champion-turned-coach Mahavir Singh Phogat that he completely erases the boundary that separates the star from the role. […]