Rollup merge of #75007 - GuillaumeGomez:cleanup-e0743, r=pickfire

Clean up E0743 explanation

r? @Dylan-DPC

Author: Manishearth

src/librustc_error_codes/error_codes/E0743.md

@@ -8,10 +8,9 @@ Erroneous code example:
 fn foo2(x: u8, y: &...) {} // error!
 ```
 
-Only foreign functions can use the C-variadic type (`...`).
-In such functions, `...` may only occur non-nested.
-That is, `y: &'a ...` is not allowed.
+Only foreign functions can use the C-variadic type (`...`). In such functions,
+`...` may only occur non-nested. That is, `y: &'a ...` is not allowed.
 
-A C-variadic type is used to give an undefined number
-of parameters to a given function (like `printf` in C).
-The equivalent in Rust would be to use macros directly.
+A C-variadic type is used to give an undefined number of parameters to a given
+function (like `printf` in C). The equivalent in Rust would be to use macros
+directly (like `println!` for example).