P2167R3: Improved Proposed Wording for LWG 2114

[ldionne]

Link: https://wg21.link/P2167R3

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The `[cmp.alg] <https://eel.is/c++draft/cmp.alg>`__ part is implemented as a DR against C++20. MSVC STL does the same. Other parts are Nothing To Do.
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