Fix raw-URL test: parser requires trailing boundary
The body_candidates portion of test_property_candidate_queries used
`see <https://x.example>` — but the URL parser only finalizes a
`<...>` raw link when the closing `>` is followed by a boundary char,
which doesn't happen at end-of-string. Add trailing text so the URL is
recognized.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>