[Port] [BUG] `yen_k_shortest_paths` with `k=2` returns same path twice

[gdalle]

See sbromberger/LightGraphs.jl#1505

[gdalle]

Seemingly caused by this bug: JuliaGraphs/SimpleWeightedGraphs.jl#6
@etiennedeg should we move this to SWG and close here?

[etiennedeg]

Yes, I think we can close this one...

[gdalle]

https://discourse.julialang.org/t/what-does-it-mean-when-yen-k-shows-only-one-route/98132/4

[gdalle]

This is now fixed in SWG