message: Fix GraphTopologyView documentation
diff: @@ -38,7 +38,7 @@ namespace grappler {
  // b = Placeholder(..)
  // c = AddN([a, a, b])
  //
  -// GraphView edges: [a:0 -> c:0, a:0 -> c:1, b:0 -> c:3]
  +// GraphView edges: [a:0 -> c:0, a:0 -> c:1, b:0 -> c:2]
  // GraphTopologyView edges: [a -> c, b -> c]
  //
  // GraphView is used for exploring single node fanins and fanouts, and
  