All text is copyrightable including source code and the comment you just typed. In fact when you look at TOS for websites you'll notice that you give an indefin

All text is copyrightable including source code and the comment you just typed. In fact when you look at TOS for websites you'll notice that you give an indefinite copyright to works by yourself on their platform including images, posts, comments etc etc etc. The fact that the code is never executed doesn't enter into the argument. The argument is whether a clean room reimplementation violates their IP rights.