Khan/khan-exercises — comment on commit 87c2c5c6ddbe59f6bf9f06fc5ac33f2453e096c0
File: khan-exercise.js line 971
By divad12:

I realize that and the proposed fix deals with that. For an exercise that doesn't have styles, it'll save in `.data('style')` an empty array. Since `[] == true`, in `makeProblem` we'll enter the if-statement and empty the style tag.