RFR: 1395: The "Review applies to <commit>" link is misleading

[Guoxiong Li]

Hi all,

This trivial patch changes the `commit hash value` to a link which contains the changed files from the first commit of a PR to this `commit`. And the test case is adjusted.

Thanks for taking the time to review.

Best Regards,
-- Guoxiong

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Commit messages:
 - 1395: The "Review applies to <commit>" link is misleading

Changes: https://git.openjdk.java.net/skara/pull/1303/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1303&range=00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-1395
  Stats: 6 lines in 2 files changed: 3 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/1303.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1303/head:pull/1303

PR: https://git.openjdk.java.net/skara/pull/1303