diff --git a/compiler/rustc_codegen_cranelift/example/gen_block_iterate.rs b/compiler/rustc_codegen_cranelift/example/gen_block_iterate.rs
index 25bfe542d228a..de9a3d550eccd 100644
--- a/compiler/rustc_codegen_cranelift/example/gen_block_iterate.rs
+++ b/compiler/rustc_codegen_cranelift/example/gen_block_iterate.rs
@@ -6,16 +6,25 @@
 #![feature(gen_blocks)]
 
 fn foo() -> impl Iterator<Item = u32> {
-    gen { yield 42; for x in 3..6 { yield x } }
+    gen {
+        yield 42;
+        for x in 3..6 {
+            yield x
+        }
+    }
 }
 
 fn moved() -> impl Iterator<Item = u32> {
     let mut x = "foo".to_string();
     gen move {
         yield 42;
-        if x == "foo" { return }
+        if x == "foo" {
+            return;
+        }
         x.clear();
-        for x in 3..6 { yield x }
+        for x in 3..6 {
+            yield x
+        }
     }
 }
 
@@ -32,5 +41,4 @@ fn main() {
     let mut iter = moved();
     assert_eq!(iter.next(), Some(42));
     assert_eq!(iter.next(), None);
-
 }
diff --git a/compiler/rustc_codegen_cranelift/rustfmt.toml b/compiler/rustc_codegen_cranelift/rustfmt.toml
index f31fa9c76abc6..35c92663eb904 100644
--- a/compiler/rustc_codegen_cranelift/rustfmt.toml
+++ b/compiler/rustc_codegen_cranelift/rustfmt.toml
@@ -1,7 +1,3 @@
-ignore = [
-    "example/gen_block_iterate.rs", # uses edition 2024
-]
-
 # Matches rustfmt.toml of rustc
 style_edition = "2024"
 use_small_heuristics = "Max"
diff --git a/rustfmt.toml b/rustfmt.toml
index 8feeb60ca12c2..c884a33729c44 100644
--- a/rustfmt.toml
+++ b/rustfmt.toml
@@ -49,7 +49,6 @@ ignore = [
 
     # These are ignored by a standard cargo fmt run.
     "compiler/rustc_codegen_cranelift/scripts",
-    "compiler/rustc_codegen_cranelift/example/gen_block_iterate.rs", # uses edition 2024
     "compiler/rustc_codegen_gcc/tests",
     # Code automatically generated and included.
     "compiler/rustc_codegen_gcc/src/intrinsic/archs.rs",
diff --git a/src/bootstrap/src/core/build_steps/format.rs b/src/bootstrap/src/core/build_steps/format.rs
index 7aa5cb2b6e5e1..b1a97bde97b5b 100644
--- a/src/bootstrap/src/core/build_steps/format.rs
+++ b/src/bootstrap/src/core/build_steps/format.rs
@@ -31,7 +31,7 @@ fn rustfmt(
     // Avoid the submodule config paths from coming into play. We only allow a single global config
     // for the workspace for now.
     cmd.arg("--config-path").arg(src.canonicalize().unwrap());
-    cmd.arg("--edition").arg("2021");
+    cmd.arg("--edition").arg("2024");
     cmd.arg("--unstable-features");
     cmd.arg("--skip-children");
     if check {
diff --git a/src/etc/test-float-parse/Cargo.toml b/src/etc/test-float-parse/Cargo.toml
index bacb9e09f3f6a..8a9c5322ef7bd 100644
--- a/src/etc/test-float-parse/Cargo.toml
+++ b/src/etc/test-float-parse/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "test-float-parse"
 version = "0.1.0"
-edition = "2021"
+edition = "2024"
 publish = false
 
 [dependencies]
diff --git a/src/etc/test-float-parse/src/gen/exhaustive.rs b/src/etc/test-float-parse/src/gen_/exhaustive.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/exhaustive.rs
rename to src/etc/test-float-parse/src/gen_/exhaustive.rs
diff --git a/src/etc/test-float-parse/src/gen/exponents.rs b/src/etc/test-float-parse/src/gen_/exponents.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/exponents.rs
rename to src/etc/test-float-parse/src/gen_/exponents.rs
diff --git a/src/etc/test-float-parse/src/gen/fuzz.rs b/src/etc/test-float-parse/src/gen_/fuzz.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/fuzz.rs
rename to src/etc/test-float-parse/src/gen_/fuzz.rs
diff --git a/src/etc/test-float-parse/src/gen/integers.rs b/src/etc/test-float-parse/src/gen_/integers.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/integers.rs
rename to src/etc/test-float-parse/src/gen_/integers.rs
diff --git a/src/etc/test-float-parse/src/gen/long_fractions.rs b/src/etc/test-float-parse/src/gen_/long_fractions.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/long_fractions.rs
rename to src/etc/test-float-parse/src/gen_/long_fractions.rs
diff --git a/src/etc/test-float-parse/src/gen/many_digits.rs b/src/etc/test-float-parse/src/gen_/many_digits.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/many_digits.rs
rename to src/etc/test-float-parse/src/gen_/many_digits.rs
diff --git a/src/etc/test-float-parse/src/gen/sparse.rs b/src/etc/test-float-parse/src/gen_/sparse.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/sparse.rs
rename to src/etc/test-float-parse/src/gen_/sparse.rs
diff --git a/src/etc/test-float-parse/src/gen/spot_checks.rs b/src/etc/test-float-parse/src/gen_/spot_checks.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/spot_checks.rs
rename to src/etc/test-float-parse/src/gen_/spot_checks.rs
diff --git a/src/etc/test-float-parse/src/gen/subnorm.rs b/src/etc/test-float-parse/src/gen_/subnorm.rs
similarity index 100%
rename from src/etc/test-float-parse/src/gen/subnorm.rs
rename to src/etc/test-float-parse/src/gen_/subnorm.rs
diff --git a/src/etc/test-float-parse/src/lib.rs b/src/etc/test-float-parse/src/lib.rs
index e2f84b085c6f5..3c3ef5802b6aa 100644
--- a/src/etc/test-float-parse/src/lib.rs
+++ b/src/etc/test-float-parse/src/lib.rs
@@ -17,7 +17,7 @@ use traits::{Float, Generator, Int};
 use validate::CheckError;
 
 /// Test generators.
-mod gen {
+mod gen_ {
     pub mod exhaustive;
     pub mod exponents;
     pub mod fuzz;
@@ -136,24 +136,24 @@ where
 {
     if F::BITS <= MAX_BITS_FOR_EXHAUUSTIVE {
         // Only run exhaustive tests if there is a chance of completion.
-        TestInfo::register::<F, gen::exhaustive::Exhaustive<F>>(tests);
+        TestInfo::register::<F, gen_::exhaustive::Exhaustive<F>>(tests);
     }
 
-    gen::fuzz::Fuzz::<F>::set_iterations(cfg.fuzz_count);
-
-    TestInfo::register::<F, gen::exponents::LargeExponents<F>>(tests);
-    TestInfo::register::<F, gen::exponents::SmallExponents<F>>(tests);
-    TestInfo::register::<F, gen::fuzz::Fuzz<F>>(tests);
-    TestInfo::register::<F, gen::integers::LargeInt<F>>(tests);
-    TestInfo::register::<F, gen::integers::SmallInt>(tests);
-    TestInfo::register::<F, gen::long_fractions::RepeatingDecimal>(tests);
-    TestInfo::register::<F, gen::many_digits::RandDigits<F>>(tests);
-    TestInfo::register::<F, gen::sparse::FewOnesFloat<F>>(tests);
-    TestInfo::register::<F, gen::sparse::FewOnesInt<F>>(tests);
-    TestInfo::register::<F, gen::spot_checks::RegressionCheck>(tests);
-    TestInfo::register::<F, gen::spot_checks::Special>(tests);
-    TestInfo::register::<F, gen::subnorm::SubnormComplete<F>>(tests);
-    TestInfo::register::<F, gen::subnorm::SubnormEdgeCases<F>>(tests);
+    gen_::fuzz::Fuzz::<F>::set_iterations(cfg.fuzz_count);
+
+    TestInfo::register::<F, gen_::exponents::LargeExponents<F>>(tests);
+    TestInfo::register::<F, gen_::exponents::SmallExponents<F>>(tests);
+    TestInfo::register::<F, gen_::fuzz::Fuzz<F>>(tests);
+    TestInfo::register::<F, gen_::integers::LargeInt<F>>(tests);
+    TestInfo::register::<F, gen_::integers::SmallInt>(tests);
+    TestInfo::register::<F, gen_::long_fractions::RepeatingDecimal>(tests);
+    TestInfo::register::<F, gen_::many_digits::RandDigits<F>>(tests);
+    TestInfo::register::<F, gen_::sparse::FewOnesFloat<F>>(tests);
+    TestInfo::register::<F, gen_::sparse::FewOnesInt<F>>(tests);
+    TestInfo::register::<F, gen_::spot_checks::RegressionCheck>(tests);
+    TestInfo::register::<F, gen_::spot_checks::Special>(tests);
+    TestInfo::register::<F, gen_::subnorm::SubnormComplete<F>>(tests);
+    TestInfo::register::<F, gen_::subnorm::SubnormEdgeCases<F>>(tests);
 }
 
 /// Configuration for a single test.
@@ -343,7 +343,7 @@ fn launch_tests(tests: &mut [TestInfo], cfg: &Config) -> Duration {
 ///
 /// This calls the generator's iterator multiple times (in parallel) and validates each output.
 fn test_runner<F: Float, G: Generator<F>>(test: &TestInfo, cfg: &Config) {
-    let gen = G::new();
+    let gen_ = G::new();
     let executed = AtomicU64::new(0);
     let failures = AtomicU64::new(0);
 
@@ -387,7 +387,7 @@ fn test_runner<F: Float, G: Generator<F>>(test: &TestInfo, cfg: &Config) {
 
     // Run the test iterations in parallel. Each thread gets a string buffer to write
     // its check values to.
-    let res = gen.par_bridge().try_for_each_init(String::new, check_one);
+    let res = gen_.par_bridge().try_for_each_init(String::new, check_one);
 
     let elapsed = started.elapsed();
     let executed = executed.into_inner();
diff --git a/tests/mir-opt/coroutine_drop_cleanup.rs b/tests/mir-opt/coroutine_drop_cleanup.rs
index 33fdd2dd0d9cb..4ae97273cd90a 100644
--- a/tests/mir-opt/coroutine_drop_cleanup.rs
+++ b/tests/mir-opt/coroutine_drop_cleanup.rs
@@ -8,7 +8,7 @@
 
 // EMIT_MIR coroutine_drop_cleanup.main-{closure#0}.coroutine_drop.0.mir
 fn main() {
-    let gen = #[coroutine]
+    let gen_ = #[coroutine]
     || {
         let _s = String::new();
         yield;