[libc++] P2655R3 common_reference_t of reference_wrapper Should Be a Reference Type (#141408) Fixes #105260 This patch applies the change as a DR to C++20. The rationale is that the paper is more like a bug fix. It does not introduce new features, it simply changes an existing behaviour (as a bug fix). MSVC STL DRed this paper to C++20 as well.
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