Taxicab bug exceptional case two nodes

[JobdeVogel]

I am having an exceptional case. My nx_shortest path is giving me 2 nodes. The taxicab algorithm then solves two partial edges. However in the code, my route is set to nx_route=[ ]. After that, the intersections is solved between the partial edges, which cannot be found. Thus, this path is giving an error.

The description in code is saying: "when the nx route is just a single node, this is a bit of an edge case", however it includes routes of two nodes. I think this is a bug.

This is an image of how the path should look like (blue: nx_route, green: partial edges)

[JobdeVogel]

Fixed it by adding following in taxicab shortest_path. Also changed first case from 2 to 1.

elif len(nx_route) == 2:
    route_edge = get_edge_geometry(G, (nx_route[0], nx_route[1], 0))
    if route_edge.intersects(orig_partial_edge_1):
          orig_partial_edge = orig_partial_edge_1
    
    if route_edge.intersects(orig_partial_edge_2):
      orig_partial_edge = orig_partial_edge_2
    
    if route_edge.intersects(dest_partial_edge_1):
      dest_partial_edge = orig_partial_edge_1
    
    if route_edge.intersects(orig_partial_edge_2):
      dest_partial_edge = orig_partial_edge_2