fixes PhpdocParamsAlignmentFixer with multi-line description

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #148
| License       | MIT

This fixes PHPDocs with multi-line descriptions getting the wrong alignment.

* [x] Still one issue with none `@param` line's (all good now)