<Swing Dev> RFR: 6690021: typos in TransferHandler Javadoc

[Prasanta Sadhukhan]

Fixed a typo removing superfluous ")"

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Commit messages:
 - 6690021: typos in TransferHandler Javadoc

Changes: https://git.openjdk.java.net/jdk/pull/452/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=452&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-6690021
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/452.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/452/head:pull/452

PR: https://git.openjdk.java.net/jdk/pull/452