50/50 imho. You still change what was there to begin with,and it made you structure your new additions into the one created by the author. Basically if you look

50/50 imho. You still change what was there to begin with,and it made you structure your new additions into the one created by the author. Basically if you look at your code evolve in eg. Git commits, you see how it evolves out of the licensed code, thus carrying the license with each commit. Not sure how I feel about that though in extreme cases like yours. Someone can create a "hello world" file and add a license to it, how should we handle that?