New test case: Paul's riddle, shortened (#1970)

This is discussed in https://github.com/KittyCAD/modeling-app/issues/1969

src/wasm-lib/tests/executor/main.rs

@@ -111,6 +111,15 @@ const part002 = startSketchOn(part001, "here")
         .unwrap();
     twenty_twenty::assert_image("tests/executor/outputs/sketch_on_face.png", &result, 0.999);
 }
+#[tokio::test(flavor = "multi_thread")]
+async fn serial_test_riddle_small() {
+    let code = include_str!("inputs/riddle_small.kcl");
+
+    let result = execute_and_snapshot(code, kittycad::types::UnitLength::Mm)
+        .await
+        .unwrap();
+    twenty_twenty::assert_image("tests/executor/outputs/riddle_small.png", &result, 0.999);
+}
 
 #[tokio::test(flavor = "multi_thread")]
 async fn serial_test_sketch_on_face_start() {