RFR: 8276679: Malformed Javadoc inline tags in JDK source in javax/swing

[Prasanta Sadhukhan]

Fixed multiple malformed Javadoc inline tags where the `@` is placed in front of the opening curly bracket (instead of behind).

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Commit messages:
 - 8276679: Malformed Javadoc inline tags in JDK source in javax/swing

Changes: https://git.openjdk.java.net/jdk/pull/6290/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6290&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276679
  Stats: 5 lines in 4 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6290.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6290/head:pull/6290

PR: https://git.openjdk.java.net/jdk/pull/6290