changed 'No-U-Turn' to 'no-U-turn' for consistency
changed 'No-U-Turn' to 'no-U-turn' for consistency

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