Function sqrt_tol

tests/fl/math/fixed_point.cpp:3550–3550

constexpr float tol() { return 0.0005f; }
constexpr float sqrt_tol() { return 0.0002f; }
constexpr float pow_tol() { return 0.015f; }
constexpr float smooth_tol() { return 0.0005f; }
constexpr float rt_tol() { return 0.001f; }