Does this require an extension on the file? One of my pet peeves with Sublime is that every package for beautification, syntax highlighting, and code-folding requires whatever I'm working on to be saved to a file using a specific extension to enable those features. Sometimes, I just need to copy and paste a few blocks of code and format, re-indent or any number of things but I don't necessarily want it saved to disk. I know this is a really niche situation but Atom is looking more and more promising to me and this edge case would help make that switch totally justifiable.