RFR: Improve stripping of code blocks

[Robin Westberg]

Hi all,

Please review this small fix that makes the stripping of code block formatting more robust.

Best regards,
Robin

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Commits:
 - d17fe52e: Improve stripping of code blocks

Changes: https://git.openjdk.java.net/skara/pull/155/files
 Webrev: https://webrevs.openjdk.java.net/skara/155/webrev.00
  Stats: 10 lines in 2 files changed: 7 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/155.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/155/head:pull/155

PR: https://git.openjdk.java.net/skara/pull/155