Update src/ConcreteRArray.jl

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: avik-pal

src/ConcreteRArray.jl

@@ -378,7 +378,7 @@ function Base.fill!(a::ConcreteRArray{T,N}, val) where {T,N}
     end
 
     idxs = ntuple(Returns(Colon()), N)
-    fn = compile(mysetindex!, (a, val, idxs...,))
+    fn = compile(mysetindex!, (a, val, idxs...))
     fn(a, val, idxs...)
     return a
 end