bors 1c19595575 Auto merge of #122616 - Jules-Bertholet:casemappingiter-layout, r=Nilstrieb
Optimize `core::char::CaseMappingIter`

Godbolt says this saves a few instructions…

`@rustbot` label T-libs A-layout C-optimization
2024-03-29 07:02:56 +00:00
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