* Use `curly_braces_in_flow_control_structures` for `foundation`
* Use `curly_braces_in_flow_control_structures` for `gestures`
* Use `curly_braces_in_flow_control_structures` for `painting`
* Use `curly_braces_in_flow_control_structures` for `physics`
* fix comments
* remove trailing space
* fix TODO style