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

Reviewed-by: jdv

src/java.desktop/share/classes/javax/swing/tree/TreeModel.java

@@ -33,7 +33,7 @@
  * <code>TreePath</code>s for identifying nodes in the <code>TreeModel</code>.
  * If a <code>TreeModel</code> returns the same object, as compared by
  * <code>equals</code>, at two different indices under the same parent
- * than the resulting <code>TreePath</code> objects will be considered equal
+ * then the resulting <code>TreePath</code> objects will be considered equal
  * as well. Some implementations may assume that if two
  * <code>TreePath</code>s are equal, they identify the same node. If this
  * condition is not met, painting problems and other oddities may result.