Fix: Delete trailing semicolon in BRB::bundle()

Normally this would be a compilation error, but Bevy has an
`impl Bundle for ()` somewhere.

The intended bundle content gets discarded and a unit is implicitly
returned. That unit is implicitly converted into a `Bundle`, satisfying
the compiler.

src/widgets/machines.rs

@@ -42,7 +42,11 @@ impl CuttingMachine {
           BackgroundColor(DARK_GRAY.into()),
           Pickable::default(),
         ))
-        .with_children(|cmds| BigRedButton::spawn_big_red_button(cmds, "CUT"));
+        .with_children(|cmds| {
+          let _button_cmds = cmds.spawn(BigRedButton::bundle("CUT"));
+          // TODO: Attach on-press observer so this machine can do something
+          // in response to that button being pressed
+        });
     });
   }
 }
@@ -82,7 +86,10 @@ impl RotatingMachine {
           BackgroundColor(DARK_GRAY.into()),
           Pickable::default(),
         ))
-        .with_children(|cmds| BigRedButton::spawn_big_red_button(cmds, "TURN"));
+        .with_children(|cmds| {
+          let button_cmds = cmds.spawn(BigRedButton::bundle("TURN"));
+          // TODO: Attach on-press observer to the button.
+        });
     });
   }
 }

src/widgets/mod.rs

@@ -120,7 +120,7 @@ impl BigRedButton {
         TextColor(WHITE.into()),
         TextShadow::default(),
       ],
-    );
+    )
   }
 
   /// Re-color the button when a pointer passes over it