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by owenm 1349 days ago
It's a diaeresis symbol rather than an umlaut, used (infrequently) to show that it's pronounced co-or rather than coor. Quite archaic, unless you're the New York Times, who use it as part of their house style, but not wrong!
1 comments

I think you're thinking of The New Yorker, not the New York Times.
Yes, you're right - I'm not from the US, but I think it's the classic example...