message: MAINT: Fix PhantomData type for Graph iterators
diff: @@ -1819,7 +1819,7 @@ impl<Ix: IndexType> WalkNeighbors<Ix> {
  #[derive(Clone, Debug)]
  pub struct NodeIndices<Ix = DefaultIx> {
  r: Range<usize>,
  - ty: PhantomData<Ix>,
  + ty: PhantomData<fn() -> Ix>,
  }
  impl<Ix: IndexType> Iterator for NodeIndices<Ix> {
  @@ -1844,7 +1844,7 @@ impl<Ix: IndexType> DoubleEndedIterator for NodeIndices<Ix> {
  #[derive(Clone, Debug)]
  pub struct EdgeIndices<Ix = DefaultIx> {
  r: Range<usize>,
  - ty: PhantomData<Ix>,
  + ty: PhantomData<fn() -> Ix>,
  }
  impl<Ix: IndexType> Iterator for EdgeIndices<Ix> {
  