Fix typo in javadoc of PathTreeFilterHandler

Change-Id: Icf0dc814baf0dc44addd102d9c03b821b4022a84

org.eclipse.jgit.pgm/src/org/eclipse/jgit/pgm/opt/PathTreeFilterHandler.java

@@ -25,7 +25,7 @@ import org.kohsuke.args4j.spi.Parameters;
 import org.kohsuke.args4j.spi.Setter;
 
 /**
- * Create a {@link org.eclipse.jgit.treewalk.filter.TreeFilter} to patch math
+ * Create a {@link org.eclipse.jgit.treewalk.filter.TreeFilter} to match path
  * names.
  * <p>
  * This handler consumes all arguments to the end of the command line, and is