rust-lang/rust#140748 will require us to adjust our format_args! lowering #19929
Description
rust-lang/rust#140748
It removes the UnsafeArg token from the constructor, we need to mimic that and gate on the toolchain version
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rust-lang/rust#140748
It removes the UnsafeArg token from the constructor, we need to mimic that and gate on the toolchain version