Update posts/2022-08-05-nll-by-default.md

Author: Mark-Simulacrum

posts/2022-08-05-nll-by-default.md

@@ -6,7 +6,7 @@ team: the NLL working group <https://www.rust-lang.org/governance/teams/compiler
 release: false
 ---
 
-As of the Rust 1.63, the "non-lexical lifetimes" (NLL) work will be enabled by default. NLL is the second iteration of Rust's borrow checker. The [RFC] actually does quite a nice job of highlighting some of the motivating examples. "But," I hear you saying, "wasn't NLL included in [Rust 2018]?" And yes, yes it was! But at that time, NLL was only enabled for Rust 2018 code, while Rust 2015 code ran in "migration mode". When in "migration mode," the compiler would run both the old *and* the new borrow checker and compare the results. This way, we could give warnings for older code that should never have compiled in the first place; we could also limit the impact of any bugs in the new code. Over time, we have limited migration mode to be closer and closer to just running the new-style borrow checker: in the next release, that process completes, and all Rust code will be checked with NLL. 
+As of Rust 1.63 (releasing next week), the "non-lexical lifetimes" (NLL) work will be enabled by default. NLL is the second iteration of Rust's borrow checker. The [RFC] actually does quite a nice job of highlighting some of the motivating examples. "But," I hear you saying, "wasn't NLL included in [Rust 2018]?" And yes, yes it was! But at that time, NLL was only enabled for Rust 2018 code, while Rust 2015 code ran in "migration mode". When in "migration mode," the compiler would run both the old *and* the new borrow checker and compare the results. This way, we could give warnings for older code that should never have compiled in the first place; we could also limit the impact of any bugs in the new code. Over time, we have limited migration mode to be closer and closer to just running the new-style borrow checker: in the next release, that process completes, and all Rust code will be checked with NLL. 
 
 [RFC]: https://rust-lang.github.io/rfcs/2094-nll.html
 [Rust 2018]: https://blog.rust-lang.org/2018/12/06/Rust-1.31-and-rust-2018.html