aho-corasick: add is_terminal

Author: james-d-mitchell

src/aho-corasick.cpp

@@ -270,6 +270,18 @@ node; either active or inactive.
 :complexity: Constant
 )pbdoc");
 
+    thing.def(
+        "is_terminal",
+        [](AhoCorasick const& ac, size_t i) {
+          ac.throw_if_node_index_out_of_range(i);
+          ac.throw_if_node_index_not_active(i);
+          return ac.node_no_checks(i).is_terminal();
+        },
+        py::arg("i"),
+        R"pbdoc(
+              TODO
+)pbdoc");
+
     // Helpers
     m.def("aho_corasick_add_word",
           &aho_corasick::add_word<word_type>,