Fix: line-comment-position "above" string option now works (fixes #7100)

[platinumazure]

What is the purpose of this pull request? (put an "X" next to item)

[ ] Documentation update
[x] Bug fix ([template](https://github.com/eslint/eslint/blob/master/templates/bug-report.md))
[ ] New rule ([template](https://github.com/eslint/eslint/blob/master/templates/rule-proposal.md))
[ ] Changes an existing rule ([template](https://github.com/eslint/eslint/blob/master/templates/rule-change-proposal.md))
[ ] Add autofixing to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:

Re: bug report template: See issue #7100.

Please check each item to ensure your pull request is ready:

• I've read the pull request guide
• I've included tests for my change
• I've updated documentation for my change (if appropriate)

What changes did you make? (Give an overview)

Added test case given in #7100, and fixed the typo in the rule.

Is there anything you'd like reviewers to focus on?

Not really, this should be pretty straightforward.

I do have a question about whether I should include test cases for things like // jscs:disable being beside code with "above" option. I don't know if that case makes sense inline, though (i.e., I know jscs:disable applies to the next line, but maybe there are other cases that should be tested).

[mention-bot]

@platinumazure, thanks for your PR! By analyzing the annotation information on this pull request, we identified @alberto to be a potential reviewer

[eslintbot]

LGTM

[mysticatea]

LGTM but would like someone else to verify.

[platinumazure]

@mysticatea Thanks! I just came up with a question for reviewers after you reviewed-- sorry! The question is:

I do have a question about whether I should include test cases for things like // jscs:disable being beside code with "above" option. I don't know if that case makes sense inline, though (i.e., I know jscs:disable applies to the next line, but maybe there are other cases that should be tested).

Please let me know if your opinion changes based on that question. Thanks!

[kaicataldo]

LGTM

[mysticatea]

LGTM since this PR addresses #7100. But it's always good if there are more tests.

[kaicataldo]

Thanks for contributing!