I have noticed that the copy editors of at least two publishers (the American Institute for Physics and American Physical Society) do something weird when they copy-edit my submitted papers. For all references to papers in Nature, which I include in my references as such:
J. W. Doe, Nature 197, 412 (1974)
they replace “Nature” by “Nature (London)”:
J. W. Doe, Nature (London) 197, 412 (1974)
I do not understand why they do that! I know it is customary in they style for books to have a city next to the publisher name (though I don't think it is very relevant in this day and age), but why do it for journals? Are there multiple different editions of Nature?