Removes the CommonReference requirement from StrictWeakOrdering.
Other papers in Standard library concepts
P0898R3Standard library conceptsRapperswil 2018P1754R1Rename concepts to
standard_case for C++20, while we still canCologne 2019P1871R1Concept traits should be named after conceptsBelfast 2019P1964R2Wording for *boolean-testable*Prague 2020P2102R0Make 'implicit expression variations' more explicitPrague 2020All 6 papers in Standard library concepts →