fix broken special test

Author: chriselrod

test/special.jl

@@ -440,8 +440,10 @@
     @test vpowf!(r1, x, x) ≈ (r2 .= x .^ x)
     @test vpow!(r1, x, Val(0.75)) ≈ (r2 .= x .^ 0.75)
     @test vpow!(r1, x, Val(2/3)) ≈ (r2 .= x .^ (2/3))
-    vpow!(r1, x, Val(0.5))
-    @test r1 ≈ (r2 .= sqrt.(x)) rtol = eps.(r1)
+    vpow!(r1, x, Val(0.5)); r2 .= sqrt.(x)
+    for i ∈ eachindex(x)
+      @test r1[i] ≈ r2[i] rtol = eps(r1[i])
+    end
     @test vpow!(r1, x, Val(1/4)) ≈ (r2 .= x .^ (1/4))
     @test vpow!(r1, x, Val(4.5)) ≈ (r2 .= x .^ 4.5)