Fix comma typo

Author: VincentDerk

src/circuit.cpp

@@ -483,7 +483,7 @@ nb::class_<Circuit>(m, "Circuit")
 .def("nb_root_nodes", &Circuit::nb_root_nodes, "number of root nodes in the circuit")
 .def("true_node", &Circuit::true_node, "adds a true node to the circuit, and returns a pointer")
 .def("false_node", &Circuit::false_node, "adds a false node to the circuit, and returns a pointer")
-.def("literal_node", &Circuit::literal_node, "adds a literal node to the circuit ,and returns a pointer")
+.def("literal_node", &Circuit::literal_node, "adds a literal node to the circuit, and returns a pointer")
 .def("or_node", &Circuit::or_node, "children"_a, "adds an or node to the circuit, and returns a pointer")
 .def("and_node", &Circuit::and_node, "children"_a, "adds an and node to the circuit, and returns a pointer")
 .def("set_root", &Circuit::set_root, "root"_a, "marks a node pointer as root")