Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 make_undirected_unweighted_graph(Arg1, Arg2)

 make_undirected_weighted_graph(Arg1, Arg2)

 make_unweighted_graph(Arg1, Arg2)

 make_weighted_graph(Arg1, Arg2)

 find_path_unweighted(Arg1, Arg2, Arg3, Arg4)

 find_path_weighted(Arg1, Arg2, Arg3, Arg4, Arg5)

 make_kn(Arg1, Arg2)

 make_kn_weighted(Arg1, Arg2, Arg3, Arg4)

 make_kn_from_vertices(Arg1, Arg2)

 cycle_unweighted(Arg1, Arg2, Arg3)

 cycle_weighted(Arg1, Arg2, Arg3, Arg4)

 is_connected(Arg1)

 node_degree(Arg1, Arg2, Arg3)

 node_degree_list(Arg1, Arg2)

 empty_unweighted_graph(Arg1, Arg2, Arg3)

 empty_weighted_graph(Arg1, Arg2, Arg3)

 is_graph_node(Arg1, Arg2)

 is_isolated_node(Arg1, Arg2)

 is_graph_edge(Arg1, Arg2)

 get_adjacent_nodes(Arg1, Arg2, Arg3)

 graph_reverse_edges(Arg1, Arg2)

 spanning_tree(Arg1, Arg2)

 mst_prim(Arg1, Arg2, Arg3)