message: DOC: Edit doc for StableGraph. It's no longer new
  With all the bug fixes, it feels rather solid now.
diff: @@ -93,8 +93,9 @@ mod serialization;
  ///
  /// - Indices don't allow as much compile time checking as references.
  ///
  -/// Depends on crate feature `stable_graph` (default). *This is a new feature in
  -/// petgraph. You can contribute to help it achieve parity with Graph.*
  +/// Depends on crate feature `stable_graph` (default). *Stable Graph is still
  +/// missing a few methods compared to Graph. You can contribute to help it
  +/// achieve parity.*
  pub struct StableGraph<N, E, Ty = Directed, Ix = DefaultIx>
  {
  g: Graph<Option<N>, Option<E>, Ty, Ix>,
  