Make fnTest not match _super in line comments

[JelteF]

Multiline comments are much harder to distinguish with a regex. This is probably an indication that the current method of testing wether super is used in a method is not very good. Maybe another method needs to be found.

[philfreo]

Can you add tests for this?

[JelteF]

I'm not sure how testing works in javascript, but it should not match against strings like these:

blabla \\ this is _super
\\ _super

And it should match against

this._super \\ _super