Add one more line of documentation

python-api-src/library.cpp

@@ -17,6 +17,8 @@ PYBIND11_MODULE(library, m)
     define_map_tools(m);
     define_building_placer(m);
 
+    // Note: This is not sc2::Coordinator but a small wrapper class which
+    // overrides the constructor of sc2::Coordinator, see library.h.
     py::class_<Coordinator>(m, "Coordinator")
         .def(py::init())
         .def(py::init<std::string>())