rstan: revision for 5bc10dcc9b52618a7c2daecd7d34c241f2cb8f8b
rstan: revision for 5bc10dcc9b52618a7c2daecd7d34c241f2cb8f8b

stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/math,stan-dev/stan,stan-dev/math,stan-dev/stan,stan-dev/stan,stan-dev/stan,stan-dev/math