[code-reflection] RFR: Clean up some examples

Wed Jan 24 23:29:24 UTC 2024

In preparation for some articles that refer to them.

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Commit messages:
 - Clean up some examples.

Changes: https://git.openjdk.org/babylon/pull/7/files
 Webrev: https://webrevs.openjdk.org/?repo=babylon&pr=7&range=00
  Stats: 732 lines in 12 files changed: 413 ins; 287 del; 32 mod
  Patch: https://git.openjdk.org/babylon/pull/7.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/7/head:pull/7

PR: https://git.openjdk.org/babylon/pull/7