Create `core::fmt::ArgumentV1` with generics instead of fn pointer Split from (and prerequisite of) #90488, as this seems to have perf implication. `@rustbot` label: +T-libs
Create `core::fmt::ArgumentV1` with generics instead of fn pointer Split from (and prerequisite of) #90488, as this seems to have perf implication. `@rustbot` label: +T-libs