Canal boats fail to dock properly

[wlindley]

Noticed this long ago but still seems a problem in the latest on git:  Create two, two-tile long dock canal stations, and a boat-horse plus a barge to serve them.  In the boat's schedule, set the stop-tiles to be the ones closest to each other -- when you operate the boat, it will stop with the barge hanging off the end of the dock -- whereas it should work "like a train" and pull forward.  In many cases this results in goods refusing to load, or unload, and barges endlessly hauling the same cargo (or empty barges) around the map. 

[jamespetts]

Hmm, this is interesting, as I do not think that I have changed the code in this respect. Can anyone confirm whether this is unique to Experimental, or whether it can be reproduced in Standard?