Every now and then, imgur.com goes crazy and gives us a generic title and description (otherwise it looks all fine though).
Simply update the test case to allow for that craziness.
We need a proper lexer to be able to understand YouTube's code, which contains /* inside of strings.
For now it's sufficient to just disable comment support altogether.
Fixes#4976, fixes#4979, fixes#4980, fixes#4981, fixes#4982.
Closes#4977.