update original

rustbook-en/listings/ch19-advanced-features/listing-19-31/hello_macro/hello_macro_derive/src/lib.rs

@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn;
 
 #[proc_macro_derive(HelloMacro)]
 pub fn hello_macro_derive(input: TokenStream) -> TokenStream {

rustbook-en/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/Cargo.toml

@@ -7,5 +7,5 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 quote = "1.0"

rustbook-en/listings/ch19-advanced-features/listing-19-33/hello_macro/hello_macro_derive/src/lib.rs

@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn;
 
 #[proc_macro_derive(HelloMacro)]
 pub fn hello_macro_derive(input: TokenStream) -> TokenStream {

rustbook-en/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/Cargo.toml

@@ -7,5 +7,5 @@ edition = "2021"
 proc-macro = true
 
 [dependencies]
-syn = "1.0"
+syn = "2.0"
 quote = "1.0"

rustbook-en/listings/ch19-advanced-features/no-listing-21-pancakes/hello_macro/hello_macro_derive/src/lib.rs

@@ -1,6 +1,5 @@
 use proc_macro::TokenStream;
 use quote::quote;
-use syn;
 
 #[proc_macro_derive(HelloMacro)]
 pub fn hello_macro_derive(input: TokenStream) -> TokenStream {

rustbook-en/src/appendix-04-useful-development-tools.md

@@ -95,7 +95,7 @@ fn main() {
 The `for` loop variable is now named `_i`, and the warning no longer appears.
 
 You can also use the `cargo fix` command to transition your code between
-different Rust editions. Editions are covered in Appendix E.
+different Rust editions. Editions are covered in [Appendix E][editions].
 
 ### More Lints with Clippy
 
@@ -178,3 +178,4 @@ particular IDE. Your IDE will gain abilities such as autocompletion, jump to
 definition, and inline errors.
 
 [rust-analyzer]: https://rust-analyzer.github.io
+[editions]: appendix-05-editions.md

rustbook-en/src/ch03-05-control-flow.md

@@ -250,6 +250,9 @@ and then check whether the `counter` is equal to `10`. When it is, we use the
 semicolon to end the statement that assigns the value to `result`. Finally, we
 print the value in `result`, which in this case is `20`.
 
+You can also `return` from inside a loop. While `break` only exits the current
+loop, `return` always exits the current function.
+
 #### Loop Labels to Disambiguate Between Multiple Loops
 
 If you have loops within loops, `break` and `continue` apply to the innermost