Fix wrong test

Author: isuruf

symengine/tests/test_eval.py

@@ -16,7 +16,7 @@ def test_eval_double2():
     x = Symbol("x")
     e = sin(x)**2 + sqrt(2)
     raises(RuntimeError, lambda: e.n(real=True))
-    assert abs(e.n() - x**2 - 1.414) < 1e-3
+    assert abs(e.n() - sin(x)**2.0 - 1.414) < 1e-3
 
 def test_n():
     x = Symbol("x")