RFR: 181: Improve approval messages

[Robin Westberg]

Hi all,

Please review this change that improves the pull request approval messages, and adjusts the formatting a bit.

Best regards,
Robin

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Commits:
 - 0970237f: Adjust approval message, improve formatting

Changes: https://git.openjdk.java.net/skara/pull/291/files
 Webrev: https://webrevs.openjdk.java.net/skara/291/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-181
  Stats: 67 lines in 5 files changed: 30 ins; 27 del; 10 mod
  Patch: https://git.openjdk.java.net/skara/pull/291.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/291/head:pull/291

PR: https://git.openjdk.java.net/skara/pull/291