Actually, since I tried to copy it by triple clicking, which selects one line (at least, I expect it to. It's what sublime text does). That didn't copy any of the malicious text, and it just stopped between the clone and the url.
I feared someone would do that. :D Well, it'd be easy to work around this if you have JS enabled... without it, it would probably not be so easy to trick you into copying multiple lines.
Even normal selection "stuck" funnily; I could tell there was something between the clone and the rest of it. Again, possible to mitigate I'm sure.