Add rust-analyzer.toml on dev new

.typos.toml

@@ -1,3 +1,6 @@
+[default.extend-words]
+"earch" = "earch" # Because of <s>earch in the list footer
+
 [files]
 extend-exclude = [
   "CHANGELOG.md",

dev/Cargo.toml

@@ -203,19 +203,21 @@ panic = "abort"
 panic = "abort"
 
 [lints.rust]
-# You shouldn't write unsafe code in Rustlings
+# You shouldn't write unsafe code in Rustlings!
 unsafe_code = "forbid"
-# You don't need unstable features in Rustlings and shouldn't rely on them while learning Rust
+# You don't need unstable features in Rustlings and shouldn't rely on them while learning Rust.
 unstable_features = "forbid"
+# Dead code warnings can't be avoided in some exercises and might distract while learning.
+dead_code = "allow"
 
 [lints.clippy]
-# You forgot a `todo!()`
+# You forgot a `todo!()`!
 todo = "forbid"
-# This can only happen by mistake in Rustlings
+# This can only happen by mistake in Rustlings.
 empty_loop = "forbid"
-# No infinite loops are needed in Rustlings
+# No infinite loops are needed in Rustlings.
 infinite_loop = "deny"
-# You shouldn't leak memory while still learning Rust
+# You shouldn't leak memory while still learning Rust!
 mem_forget = "deny"
 # Currently, there are no disallowed methods. This line avoids problems when developing Rustlings.
 disallowed_methods = "allow"

exercises/08_enums/enums2.rs

@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 #[derive(Debug)]
 struct Point {
     x: u64,

exercises/10_modules/modules2.rs

@@ -1,7 +1,6 @@
 // You can bring module paths into scopes and provide new names for them with
 // the `use` and `as` keywords.
 
-#[allow(dead_code)]
 mod delicious_snacks {
     // TODO: Add the following two `use` statements after fixing them.
     // use self::fruits::PEAR as ???;

exercises/15_traits/traits3.rs

@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 trait Licensed {
     // TODO: Add a default implementation for `licensing_info` so that
     // implementors like the two structs below can share that default behavior

exercises/19_smart_pointers/rc1.rs

@@ -8,7 +8,6 @@ use std::rc::Rc;
 #[derive(Debug)]
 struct Sun;
 
-#[allow(dead_code)]
 #[derive(Debug)]
 enum Planet {
     Mercury(Rc<Sun>),

solutions/08_enums/enums2.rs

@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 #[derive(Debug)]
 struct Point {
     x: u64,

solutions/10_modules/modules2.rs

@@ -1,4 +1,3 @@
-#[allow(dead_code)]
 mod delicious_snacks {
     // Added `pub` and used the expected alias after `as`.
     pub use self::fruits::PEAR as fruit;

solutions/15_traits/traits3.rs

@@ -1,5 +1,3 @@
-#![allow(dead_code)]
-
 trait Licensed {
     fn licensing_info(&self) -> String {
         "Default license".to_string()

solutions/19_smart_pointers/rc1.rs

@@ -8,7 +8,6 @@ use std::rc::Rc;
 #[derive(Debug)]
 struct Sun;
 
-#[allow(dead_code)]
 #[derive(Debug)]
 enum Planet {
     Mercury(Rc<Sun>),

src/dev/new.rs

@@ -6,7 +6,7 @@ use std::{
     process::Command,
 };
 
-use crate::CURRENT_FORMAT_VERSION;
+use crate::{init::RUST_ANALYZER_TOML, CURRENT_FORMAT_VERSION};
 
 // Create a directory relative to the current directory and print its path.
 fn create_rel_dir(dir_name: &str, current_dir: &str) -> Result<()> {
@@ -62,6 +62,8 @@ pub fn new(path: &Path, no_git: bool) -> Result<()> {
 
     write_rel_file("README.md", &dir_path_str, README)?;
 
+    write_rel_file("rust-analyzer.toml", &dir_path_str, RUST_ANALYZER_TOML)?;
+
     create_rel_dir(".vscode", &dir_path_str)?;
     write_rel_file(
         ".vscode/extensions.json",

src/init.rs

@@ -130,7 +130,7 @@ pub fn init() -> Result<()> {
     fs::write("Cargo.toml", updated_cargo_toml)
         .context("Failed to create the file `rustlings/Cargo.toml`")?;
 
-    fs::write("rust-analyzer.toml", RATOML)
+    fs::write("rust-analyzer.toml", RUST_ANALYZER_TOML)
         .context("Failed to create the file `rustlings/rust-analyzer.toml`")?;
 
     fs::write(".gitignore", GITIGNORE)
@@ -172,10 +172,9 @@ const INIT_SOLUTION_FILE: &[u8] = b"fn main() {
 }
 ";
 
-const RATOML: &[u8] = br#"# rust-analyzer configuration file
-# DO NOT edit what is already defined.
-# You may add new configurations as needed.
-check.extraArgs = ["--profile", "test"]"#;
+pub const RUST_ANALYZER_TOML: &[u8] = br#"check.command = "clippy"
+check.extraArgs = ["--profile", "test"]
+"#;
 
 const GITIGNORE: &[u8] = b"Cargo.lock
 target/