Update test_onepass.jl

Author: jbcaillau

test/test_onepass.jl

@@ -780,7 +780,7 @@ function test_onepass()
             w ∈ R, control
             r = y₃
             v = y₄
-            aa = y₁(s) + v³ + z₂
+            aa = y₁(s) + v^3 + z₂
             ẏ(s) == [aa(s) + w(s)^2, r(s)^2, 0, 0]
             0 => min # generic (untested)
         end
@@ -2805,4 +2805,4 @@ function test_onepass()
         @test __dynamics(o)(0, x, u, z) == [x[2], x[1]^2 + z[1]]
         @test lagrange(o)(0, x, u, z) == u[1]^2 + z[1] * x[1]
     end
-end
+end