I've done it, thanks to using terminal copy/paste (either my actual clipboard, or GNU screen's copy buffer) instead of my editor's built-in copy/paste. Sometime

I've done it, thanks to using terminal copy/paste (either my actual clipboard, or GNU screen's copy buffer) instead of my editor's built-in copy/paste. Sometimes it's because I'm viewing a patch in a web UI or `git show` and pasting a few lines from it into my text editor. But you notice your mistake very quickly and I've never sent code to code review with spaces instead of tabs.