Yes, it looks like you modified that line. The “Wl” as opposed to “W1” there will not end well, if that’s what it really says.
But perhaps this is all just a side effect of the way you “copy/pasted” the data. Things look a bit scrambled, as I mentioned above.
If you actually modified the file public_tests.py, that is not a good idea. If so, you should use the “Get a clean copy” procedure here to revert to the standard version. If you read all the way through that post, it talks about the other files besides the notebook.