Returns a new instance with URL patterns from the current instance ("this") and
the "other" instance as follows:
<ul>
<li>If there are patterns in both instances, combine the patterns in "this" with
the patterns in "other" using {@link hunt.framework.util.PathMatcher#combine(string, string)}.
<li>If only one instance has patterns, use them.
<li>If neither instance has patterns, use an empty string (i.e. "").
</ul>
Returns a new instance with URL patterns from the current instance ("this") and the "other" instance as follows: <ul> <li>If there are patterns in both instances, combine the patterns in "this" with the patterns in "other" using {@link hunt.framework.util.PathMatcher#combine(string, string)}. <li>If only one instance has patterns, use them. <li>If neither instance has patterns, use an empty string (i.e. ""). </ul>