Add some witnesses to UnsignedInt and basic tests. -------------
Commit messages: - Add trailing newline. - 8375482: Basic tests for UnsignedInt Changes: https://git.openjdk.org/valhalla/pull/1991/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1991&range=00 Stats: 266 lines in 2 files changed: 265 ins; 0 del; 1 mod Patch: https://git.openjdk.org/valhalla/pull/1991.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1991/head:pull/1991 PR: https://git.openjdk.org/valhalla/pull/1991
