Unicode FTW

Co-authored-by: Jan Hohenheim <jan@hohenheim.ch>

examples/3d/perspective_zoom.rs

@@ -31,7 +31,7 @@ fn setup(
     mut materials: ResMut<Assets<StandardMaterial>>,
 ) {
     camera_settings.orbit_speed = 0.02;
-    // Clamp FOV to this range. Note that we can't adjust FOV to more than PI,
+    // Clamp FOV to this range. Note that we can't adjust FOV to more than π,
     // which represents a 180 degree field.
     let min_zoom = PI / 6.;
     let max_zoom = PI - 0.1;