Reformat use declarations.

The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.

compiler/rustc_feature/src/accepted.rs

@@ -1,8 +1,9 @@
 //! List of the accepted feature gates.
 
-use super::{to_nonzero, Feature};
 use rustc_span::symbol::sym;
 
+use super::{to_nonzero, Feature};
+
 macro_rules! declare_features {
     ($(
         $(#[doc = $doc:tt])* (accepted, $feature:ident, $ver:expr, $issue:expr),

compiler/rustc_feature/src/builtin_attrs.rs

@@ -1,16 +1,15 @@
 //! Built-in attributes and `cfg` flag gating.
 
+use std::sync::LazyLock;
+
+use rustc_data_structures::fx::FxHashMap;
+use rustc_span::symbol::{sym, Symbol};
 use AttributeDuplicates::*;
 use AttributeGate::*;
 use AttributeType::*;
 
 use crate::{Features, Stability};
 
-use rustc_data_structures::fx::FxHashMap;
-use rustc_span::symbol::{sym, Symbol};
-
-use std::sync::LazyLock;
-
 type GateFn = fn(&Features) -> bool;
 
 macro_rules! cfg_fn {

compiler/rustc_feature/src/lib.rs

@@ -25,9 +25,10 @@ mod unstable;
 #[cfg(test)]
 mod tests;
 
-use rustc_span::symbol::Symbol;
 use std::num::NonZero;
 
+use rustc_span::symbol::Symbol;
+
 #[derive(Debug, Clone)]
 pub struct Feature {
     pub name: Symbol,
@@ -126,11 +127,10 @@ pub fn find_feature_issue(feature: Symbol, issue: GateIssue) -> Option<NonZero<u
 }
 
 pub use accepted::ACCEPTED_FEATURES;
-pub use builtin_attrs::AttributeDuplicates;
 pub use builtin_attrs::{
     deprecated_attributes, encode_cross_crate, find_gated_cfg, is_builtin_attr_name,
-    is_valid_for_get_attr, AttributeGate, AttributeSafety, AttributeTemplate, AttributeType,
-    BuiltinAttribute, GatedCfg, BUILTIN_ATTRIBUTES, BUILTIN_ATTRIBUTE_MAP,
+    is_valid_for_get_attr, AttributeDuplicates, AttributeGate, AttributeSafety, AttributeTemplate,
+    AttributeType, BuiltinAttribute, GatedCfg, BUILTIN_ATTRIBUTES, BUILTIN_ATTRIBUTE_MAP,
 };
 pub use removed::REMOVED_FEATURES;
 pub use unstable::{Features, INCOMPATIBLE_FEATURES, UNSTABLE_FEATURES};

compiler/rustc_feature/src/removed.rs

@@ -1,8 +1,9 @@
 //! List of the removed feature gates.
 
-use super::{to_nonzero, Feature};
 use rustc_span::symbol::sym;
 
+use super::{to_nonzero, Feature};
+
 pub struct RemovedFeature {
     pub feature: Feature,
     pub reason: Option<&'static str>,

compiler/rustc_feature/src/unstable.rs

@@ -1,11 +1,11 @@
 //! List of the unstable feature gates.
 
-use super::{to_nonzero, Feature};
-
 use rustc_data_structures::fx::FxHashSet;
 use rustc_span::symbol::{sym, Symbol};
 use rustc_span::Span;
 
+use super::{to_nonzero, Feature};
+
 pub struct UnstableFeature {
     pub feature: Feature,
     pub set_enabled: fn(&mut Features),