fixed OneClassPerFileFixer with ::class

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #377
| License       | MIT
whoops :) that was debugging code. the Tokens is not exportable for debugger so I used this little track.