RFR: 8364370: java.text.DecimalFormat specification indentation correction

[Justin Lu]

Please review this doc only PR.

java.text.DecimalFormat uses an implSpec tag in the middle of the class description. This location was on purpose as the contents related to the surrounding section. However, this has caused slight indentation in the rest of the class description below the tag (as pointed out by @naotoj) . Using the implSpec tag at the bottom of the class is preferable for formatting purposes.

There are no contract changes, simply a re-organization of existing contents, thus no CSR is filed.

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Commit messages:
 - init

Changes: https://git.openjdk.org/jdk/pull/26585/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26585&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8364370
  Stats: 13 lines in 1 file changed: 7 ins; 6 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26585.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26585/head:pull/26585

PR: https://git.openjdk.org/jdk/pull/26585