* Add a blank line before ``return`` statements, unless the return is alone

inside a statement-group (like an ``if`` statement);

* Use just ``return;`` instead of ``return null;`` when a function must return void

early;

* Use just ``return;`` instead of ``return null;`` when a function must return

voidearly;

* Use braces to indicate control structure body regardless of the number of

statements it contains;