Nope. Just try insert code formatter with 8 spaces into code formatted with 4, or 2. IDE will make something that compiles, it doesn't mean that it works properly.
Mixed spaces and tabs as a next go, and it worked too---converting the pasted tabs into spaces of my style.
Smart-tabbing is pretty smart.
Granted, I knew that so long as the indents were proper (i.e it compiles), that pasting at that point would give valid code but... I can't see how using braces would have been different. Just because it compiles, doesn't mean it works. I've pasted javascript incorrectly multiple time to produce valid, but incorrect for my needs code.