[bgilroy26]

I'm not a part of Codecademy, but that's part of the Auto-Linting that they run all over the site, you can read more about javascript analysis tools here[1].

I agree that the linter can be over-opinionated at times, and that definitely clashes with the community approach to teaching, where seems every lesson author has his or her own coding style quirks.

I doubt that at this point the decision about whether to have a strict style policy, or to roll their own Codecademy linter, or to leave things the way they are has made it to the top of their priorities list.

Until it does, the linter will be helpful most of the time and annoying some of the time.

1. http://en.wikipedia.org/wiki/JSLint