Update multidimensional.jl

add missing ()

Author: N5N3

base/multidimensional.jl

@@ -616,7 +616,7 @@ module IteratorsMD
     @inline function _splitlinear(rs::ReshapedArray, i::Int)
         axp = axes(rs.parent)
         ci = _ind2sub_rs(axp, rs.mi, i)
-        length(ci) == 2 ? ci : ci[1], Base._sub2ind(tail(axp), tail(ci)...)
+        length(ci) == 2 ? ci : (ci[1], Base._sub2ind(tail(axp), tail(ci)...))
     end
     simd_outer_range(iter::CartesianPartition{CartesianIndex{0}}) = ((0,1,iter[]),)
     @inline function simd_outer_range(iter::CartesianPartition)