move fn defn to abstractarray.jl

Author: jishnub

src/SArray.jl

@@ -283,6 +283,3 @@ end
 function promote_rule(::Type{<:SArray{S,T,N,L}}, ::Type{<:SArray{S,U,N,L}}) where {S,T,U,N,L}
     SArray{S,promote_type(T,U),N,L}
 end
-
-# SArrays may avoid the SubArray wrapper and consequently an additional level of indirection
-Base.view(S::SArray, I...) = getindex(S, I...)

src/abstractarray.jl

@@ -295,3 +295,6 @@ if VERSION >= v"1.6.0-DEV.1334"
         return similar_type(typeof(a), Size(newlen))(Base.rest(Tuple(a), i + 1))
     end
 end
+
+# SArrays may avoid the SubArray wrapper and consequently an additional level of indirection
+Base.view(S::SArray, I...) = getindex(S, I...)