Possible vandalism in Tagus River, could't find the change set

can anyone please try to find the change set responsible for this https://www.openstreetmap.org/#map=14/38.6837/-9.1140 and if possible, revert it?

Trying to find it in OSM website history tab is a mess. I couldn’t find it. What is the best tool to find a change set like this one?
Thanks in advance.

I think it was this changeset: http://www.openstreetmap.org/changeset/35648730 by new user Brunodejesus, which I have just reverted. I think they accidentally deleted this way https://www.openstreetmap.org/way/11369668

Tools to figure this out? I actually managed to figure it out using the “whodidit” tool http://zverik.osm.rambler.ru/whodidit/?zoom=17&lat=38.69852&lon=-9.17235&layers=BTT because the changeset involving the deletion stood out quite nicely using that (red box) which was a surprise to me. I’ve not actually used that tool much, but it worked well.

See also http://wiki.openstreetmap.org/wiki/Quality_assurance#Monitoring_Tools

for more tools like this one!

Thank you very much!