u02/tests: Fix inverted logic in comment

u02/src/tests.cpp

@@ -514,7 +514,7 @@ TEST_CASE("Sweep line (prop: Barycentric coordinates)") {
     for (int y = 0; y < size; y++) {
       if (point_in_triangle(x0, y0, x1, y1, x2, y2, x, y)) {
         if (!canvas->get_pixel(x, y)) {
-          // Barycentric coordinates say, point is not in triangle,
+          // Barycentric coordinates say, point is in triangle,
           // but point is not set.
           // This must not happen → fail test.
           pass = false;