update unstable book

Author: dianne

src/doc/unstable-book/src/language-features/ref-pat-eat-one-layer-2024-structural.md

@@ -10,10 +10,11 @@ This feature is incomplete and not yet intended for general use.
 
 This implements experimental, Edition-dependent match ergonomics under consideration for inclusion
 in Rust.
-For more information, see the corresponding typing rules for [Editions 2024 and later].
-On earlier Editions, the current behavior is unspecified.
+For more information, see the corresponding typing rules for [Editions 2021 and earlier] and for
+[Editions 2024 and later].
 
 For alternative experimental match ergonomics, see the feature
 [`ref_pat_eat_one_layer_2024`](./ref-pat-eat-one-layer-2024.md).
 
+[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQIBAQEBAAAAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=false
 [Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAgEBAQEBAgIAAAAAAAAAAAAAAAA%3D&mode=rules&do_cmp=false

src/doc/unstable-book/src/language-features/ref-pat-eat-one-layer-2024.md

@@ -10,10 +10,11 @@ This feature is incomplete and not yet intended for general use.
 
 This implements experimental, Edition-dependent match ergonomics under consideration for inclusion
 in Rust.
-For more information, see the corresponding typing rules for [Editions 2024 and later].
-On earlier Editions, the current behavior is unspecified.
+For more information, see the corresponding typing rules for [Editions 2021 and earlier] and for
+[Editions 2024 and later].
 
 For alternative experimental match ergonomics, see the feature
 [`ref_pat_eat_one_layer_2024_structural`](./ref-pat-eat-one-layer-2024-structural.md).
 
+[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQABAQABAAAAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
 [Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAAABAQABAgIAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false