Replace / \ in graph_info.h

These are causing compilation warnings and errors because of lines ending in \ and `\ `

Easier to just avoid these characters altogether.

PiperOrigin-RevId: 699934444

tflite/graph_info.h

@@ -124,23 +124,23 @@ using ControlEdges = std::vector<ControlEdge>;
 // (Example: with `greedily`, `control_edges.empty()`, and `nodes_to_partition
 // == {2, 3}`, the graph
 //
-//                    /------------\
+//                    ▼------------▼
 //                    |            v
 // 0 --> 1 --> 2* --> 3*     4 --> 5
 //       |                   ^
-//       \-------------------/
+//       ▲-------------------▲
 //
 // will be partitioned as {{0, 1, 4}, {2, 3}, {5}}, since data dependencies
 // (notated '-->') allow for execution of 4 immediately after 1.
 //
 // With an additional control dependency `control_edges == {{3, 4}}` (notated
 // '==>'), execution of node 4 requires prior execution of node 3:
 //
-//                    /------------\
+//                    ▼------------▼
 //                    |            v
 // 0 --> 1 --> 2* --> 3* ==> 4 --> 5
 //       |                   ^
-//       \-------------------/
+//       ▲-------------------▲
 //
 // and the partitioning will be {{0, 1}, {2, 3}, {4, 5}}.)
 //