Update src/sparse_int_set.jl

Co-authored-by: Lyndon White <[email protected]>

Author: tkf

src/sparse_int_set.jl

@@ -210,8 +210,9 @@ struct ZippedSparseIntSetIterator{VT,IT}
     end
 end
 
-Base.zip(s0::SparseIntSet, s::SparseIntSet...; kwargs...) =
-    ZippedSparseIntSetIterator(s0, s...; kwargs...)
+function Base.zip(s0::SparseIntSet, s::SparseIntSet...; kwargs...)
+    return ZippedSparseIntSetIterator(s0, s...; kwargs...)
+end
 
 length(it::ZippedSparseIntSetIterator) = length(it.shortest_set)