Filled, where there were adjacent disconnected ends. Please check https://tools.geofabrik.de/osmi/?view=pubtrans_routes&lon=-1.25967&lat=51.74965&zoom=14 in a day or so's time to start diagnosing other bad routes (converting the PTv1 ones to PTv2, then splitting them at the Railway road work gap while that work progresses)

Maybe we should coordinate this via the wiki? I might make a sub-page under https://wiki.openstreetmap.org/wiki/Oxford#Bus_Route_Mapping 