Adding metaVar = "REGEX" to the @Args4jOption would make the help output would improve the help output,e,g.

````
-recurse1 REGEX                        : Optional regex; if specified, INPUT1
                                          is recursively searched for directorie
                                          s matching this pattern, whose
                                          contents are loaded and merged prior
                                          to running the comparison
 -recurse2 REGEX                        : Optional regex; if specified, INPUT2
                                          is recursively searched for directorie
                                          s matching this pattern, whose
                                          contents are loaded and merged prior
                                          to running the comparison
````