RFR: 1985: Format error of Issues in pull Request body

[Zhao Song]

Format error of Issues in Pull Request body, we need to add some line breaks.

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Commit messages:
 - SKARA-1985

Changes: https://git.openjdk.org/skara/pull/1542/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1542&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-1985
  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/skara/pull/1542.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1542/head:pull/1542

PR: https://git.openjdk.org/skara/pull/1542