<Swing Dev> RFR: 6646602: Spelling error in javadoc for javax.swing.tree.TreeModel

[Prasanta Sadhukhan]

Fixed a typo in the documentation.

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Commit messages:
 - 6646602: Spelling error in javadoc for javax.swing.tree.TreeModel

Changes: https://git.openjdk.java.net/jdk/pull/453/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=453&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-6646602
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/453.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/453/head:pull/453

PR: https://git.openjdk.java.net/jdk/pull/453