Switch tuple to array

Author: gaurav-arya

src/TestUtils.jl

@@ -108,9 +108,9 @@ function test_fft_backend(ArrayType=Array; test_real=true, test_inplace=true)
             P = plan_bfft(similar(y), dims)
             @test mul!(similar(x_complexfloat), P, copy(y)) ≈ fftw_bfft
             plans_to_test = if test_inplace
-                [P, plan_bfft!(similar(y), dims)]
+                (P, plan_bfft!(similar(y), dims))
             else
-                [P]
+                (P,)
             end
             for P in plans_to_test
                 @test eltype(P) <: Complex