The three groups of tests are:
- Explicitly targeted by the sniff and found on unsupported version
- Same above, but not found on supported versions
- Cases that are not the sniff's target, but using similar tokens or syntax that might throw false positives

Added a parse error test case, since PHPCS can be used as a plugin, and so will run on code still being typed (live coding).

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

Co-authored-by: Juliette <663378+jrfnl@users.noreply.github.com>

…sts to their own test files

…move test down

... to comply with expected order of the test methods.

* Add missing line numbers to data provider
* Add one extra test case

* Fix tag order in test docblocks.
* Use proper punctuation in inline comments in sniff.
* Use FQN class refs in docblocks.