This PR proposes to add @sealedGraph to `IllegalFormatException` -------------
Commit messages: - Add @sealedGraph to IllegalFormatException Changes: https://git.openjdk.org/jdk/pull/16140/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16140&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8317873 Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/16140.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/16140/head:pull/16140 PR: https://git.openjdk.org/jdk/pull/16140
