I hear people say this but I don't really get it. This has been a problem for me so infrequently that I can't even recall an incident where it wasn't so trivia

I hear people say this but I don't really get it. This has been a problem for me so infrequently that I can't even recall an incident where it wasn't so trivial to fix that I did it unconsciously. Maybe if the website/ebook has messed up formatting or you're pasting from some monstrosity of a PDF - but in the real world - not an issue. Maybe my editor (PyCharm) is doing clever things to protect me from this - who knows...