On 2019-10-17 18:38:15 +0200 (+0200), Roman Gorshunov wrote: [...]
I think it comes from the way how Apache 2.0 license needs to get applied [...]
Well, the Sphinx configuration directive could be considered independent from asserting copyright in individual source files. It's a general blurb which the theme incorporates into the rendered footer of all pages, so if some pages' content are copyrighted by other contributing organizations then the copyright info displayed on that page becomes incorrect. This is why it tends to be simpler to just use a vague copyright entity in the Sphinx config field so that some copyright is asserted/implied, while allowing the individual copyrights of various files to differ from one another. -- Jeremy Stanley