fixed typo in testset title

Author: matthias314

test/packedvector.jl

@@ -231,7 +231,7 @@ function red_mod(N, v::AbstractVector{T}) where T <: Integer
     map(x -> (x << k) >> k, v)
 end
 
-@testset "PackedVector add/sub" begin
+@testset "PackedVector add/mul" begin
     for U in (UInt8, UInt16, UInt32, UInt64, UInt128),
             T in (Int8, UInt8, Int16, UInt16, Int32, UInt32),
             N in 1:bitsize(T)