Document the policy-based versions of thrust::adjacent_difference
Document the policy-based versions of thrust::adjacent_difference

GrimDerp/thrust,zhenglaizhang/thrust,GrimDerp/thrust,arnabgho/thrust,jaredhoberock/thrust,mohamed-ali/thrust,xiongzhanblake/thrust_src,zeryx/thrust,thvasilo/thrust,marksantos/thrust,jaredhoberock/thrust,thvasilo/thrust,sarvex/thrust,egaburov/thrust,thrust/thrust,Ricardo666666/thrust,thrust/thrust,zeryx/thrust,xiongzhanblake/thrust_src,dachziegel/thrust,thrust/thrust,zhenglaizhang/thrust,thrust/thrust,andrewcorrigan/thrust-multi-permutation-iterator,sdalton1/thrust,egaburov/thrust,Ricardo666666/thrust,xiongzhanblake/thrust,dachziegel/thrust,dachziegel/thrust,zeryx/thrust,xiongzhanblake/thrust,zhenglaizhang/thrust,jaredhoberock/thrust,jaredhoberock/thrust,sdalton1/thrust,sarvex/thrust,raygit/thrust,mohamed-ali/thrust,marksantos/thrust,andrewcorrigan/thrust-multi-permutation-iterator,arnabgho/thrust,jaredhoberock/thrust,xiongzhanblake/thrust,Ricardo666666/thrust,thrust/thrust,sarvex/thrust,egaburov/thrust,thvasilo/thrust,xiongzhanblake/thrust_src,sdalton1/thrust,arnabgho/thrust,andrewcorrigan/thrust-multi-permutation-iterator,raygit/thrust,raygit/thrust,GrimDerp/thrust,marksantos/thrust,mohamed-ali/thrust