I'd been working for probably about 5 years before a colleague moaned at me for not doing this - and that is how I discovered that it was a thing people did. I

I'd been working for probably about 5 years before a colleague moaned at me for not doing this - and that is how I discovered that it was a thing people did. I looked again at the code, and... well, what do you know. About 75% of my colleagues did it too! I'd never noticed.