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_span/src/caching_source_map_view.rs

@@ -1,7 +1,9 @@
+use std::ops::Range;
+
+use rustc_data_structures::sync::Lrc;
+
 use crate::source_map::SourceMap;
 use crate::{BytePos, Pos, RelativeBytePos, SourceFile, SpanData};
-use rustc_data_structures::sync::Lrc;
-use std::ops::Range;
 
 #[derive(Clone)]
 struct CacheEntry {

compiler/rustc_span/src/def_id.rs

@@ -1,4 +1,6 @@
-use crate::{HashStableContext, SpanDecoder, SpanEncoder, Symbol};
+use std::fmt;
+use std::hash::{BuildHasherDefault, Hash, Hasher};
+
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::stable_hasher::{
     Hash64, HashStable, StableHasher, StableOrd, ToStableHashKey,
@@ -8,8 +10,8 @@ use rustc_data_structures::AtomicRef;
 use rustc_index::Idx;
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 use rustc_serialize::{Decodable, Encodable};
-use std::fmt;
-use std::hash::{BuildHasherDefault, Hash, Hasher};
+
+use crate::{HashStableContext, SpanDecoder, SpanEncoder, Symbol};
 
 pub type StableCrateIdMap =
     indexmap::IndexMap<StableCrateId, CrateNum, BuildHasherDefault<Unhasher>>;

compiler/rustc_span/src/edit_distance.rs

@@ -9,9 +9,10 @@
 // algorithm should not matter to the caller of the methods, which is why it is not noted in the
 // documentation.
 
-use crate::symbol::Symbol;
 use std::{cmp, mem};
 
+use crate::symbol::Symbol;
+
 #[cfg(test)]
 mod tests;
 

compiler/rustc_span/src/hygiene.rs

@@ -24,10 +24,11 @@
 // because getting it wrong can lead to nested `HygieneData::with` calls that
 // trigger runtime aborts. (Fortunately these are obvious and easy to fix.)
 
-use crate::def_id::{CrateNum, DefId, StableCrateId, CRATE_DEF_ID, LOCAL_CRATE};
-use crate::edition::Edition;
-use crate::symbol::{kw, sym, Symbol};
-use crate::{with_session_globals, HashStableContext, Span, SpanDecoder, SpanEncoder, DUMMY_SP};
+use std::cell::RefCell;
+use std::collections::hash_map::Entry;
+use std::fmt;
+use std::hash::Hash;
+
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
 use rustc_data_structures::stable_hasher::{Hash64, HashStable, HashingControls, StableHasher};
@@ -36,12 +37,13 @@ use rustc_data_structures::unhash::UnhashMap;
 use rustc_index::IndexVec;
 use rustc_macros::{Decodable, Encodable, HashStable_Generic};
 use rustc_serialize::{Decodable, Decoder, Encodable, Encoder};
-use std::cell::RefCell;
-use std::collections::hash_map::Entry;
-use std::fmt;
-use std::hash::Hash;
 use tracing::{debug, trace};
 
+use crate::def_id::{CrateNum, DefId, StableCrateId, CRATE_DEF_ID, LOCAL_CRATE};
+use crate::edition::Edition;
+use crate::symbol::{kw, sym, Symbol};
+use crate::{with_session_globals, HashStableContext, Span, SpanDecoder, SpanEncoder, DUMMY_SP};
+
 /// A `SyntaxContext` represents a chain of pairs `(ExpnId, Transparency)` named "marks".
 #[derive(Clone, Copy, PartialEq, Eq, Hash)]
 pub struct SyntaxContext(u32);

compiler/rustc_span/src/lib.rs

@@ -47,15 +47,17 @@ use tracing::debug;
 
 mod caching_source_map_view;
 pub mod source_map;
-pub use self::caching_source_map_view::CachingSourceMapView;
 use source_map::{SourceMap, SourceMapInputs};
 
+pub use self::caching_source_map_view::CachingSourceMapView;
+
 pub mod edition;
 use edition::Edition;
 pub mod hygiene;
 use hygiene::Transparency;
-pub use hygiene::{DesugaringKind, ExpnKind, MacroKind};
-pub use hygiene::{ExpnData, ExpnHash, ExpnId, LocalExpnId, SyntaxContext};
+pub use hygiene::{
+    DesugaringKind, ExpnData, ExpnHash, ExpnId, ExpnKind, LocalExpnId, MacroKind, SyntaxContext,
+};
 use rustc_data_structures::stable_hasher::HashingControls;
 pub mod def_id;
 use def_id::{CrateNum, DefId, DefIndex, DefPathHash, LocalDefId, StableCrateId, LOCAL_CRATE};
@@ -71,10 +73,6 @@ pub mod fatal_error;
 
 pub mod profiling;
 
-use rustc_data_structures::fx::FxHashMap;
-use rustc_data_structures::stable_hasher::{Hash128, Hash64, HashStable, StableHasher};
-use rustc_data_structures::sync::{FreezeLock, FreezeWriteGuard, Lock, Lrc};
-
 use std::borrow::Cow;
 use std::cmp::{self, Ordering};
 use std::hash::Hash;
@@ -83,8 +81,10 @@ use std::path::{Path, PathBuf};
 use std::str::FromStr;
 use std::{fmt, iter};
 
-use md5::Digest;
-use md5::Md5;
+use md5::{Digest, Md5};
+use rustc_data_structures::fx::FxHashMap;
+use rustc_data_structures::stable_hasher::{Hash128, Hash64, HashStable, StableHasher};
+use rustc_data_structures::sync::{FreezeLock, FreezeWriteGuard, Lock, Lrc};
 use sha1::Sha1;
 use sha2::Sha256;
 

compiler/rustc_span/src/profiling.rs

@@ -1,9 +1,9 @@
-use crate::source_map::SourceMap;
-
 use std::borrow::Borrow;
 
 use rustc_data_structures::profiling::EventArgRecorder;
 
+use crate::source_map::SourceMap;
+
 /// Extension trait for self-profiling purposes: allows to record spans within a generic activity's
 /// event arguments.
 pub trait SpannedEventArgRecorder {

compiler/rustc_span/src/source_map.rs

@@ -9,15 +9,16 @@
 //! within the `SourceMap`, which upon request can be converted to line and column
 //! information, source code snippets, etc.
 
-use crate::*;
+use std::io::{self, BorrowedBuf, Read};
+use std::{fs, path};
+
 use rustc_data_structures::sync::{IntoDynSyncSend, MappedReadGuard, ReadGuard, RwLock};
 use rustc_data_structures::unhash::UnhashMap;
 use rustc_macros::{Decodable, Encodable};
-use std::fs;
-use std::io::{self, BorrowedBuf, Read};
-use std::path;
 use tracing::{debug, instrument, trace};
 
+use crate::*;
+
 #[cfg(test)]
 mod tests;
 

compiler/rustc_span/src/span_encoding.rs

@@ -1,14 +1,12 @@
-use crate::def_id::{DefIndex, LocalDefId};
-use crate::hygiene::SyntaxContext;
-use crate::SPAN_TRACK;
-use crate::{BytePos, SpanData};
-
 use rustc_data_structures::fx::FxIndexSet;
-
 // This code is very hot and uses lots of arithmetic, avoid overflow checks for performance.
 // See https://github.com/rust-lang/rust/pull/119440#issuecomment-1874255727
 use rustc_serialize::int_overflow::DebugStrictAdd;
 
+use crate::def_id::{DefIndex, LocalDefId};
+use crate::hygiene::SyntaxContext;
+use crate::{BytePos, SpanData, SPAN_TRACK};
+
 /// A compressed span.
 ///
 /// [`SpanData`] is 16 bytes, which is too big to stick everywhere. `Span` only

compiler/rustc_span/src/symbol.rs

@@ -2,6 +2,9 @@
 //! allows bidirectional lookup; i.e., given a value, one can easily find the
 //! type, and vice versa.
 
+use std::hash::{Hash, Hasher};
+use std::{fmt, str};
+
 use rustc_arena::DroplessArena;
 use rustc_data_structures::fx::FxIndexSet;
 use rustc_data_structures::stable_hasher::{
@@ -10,10 +13,6 @@ use rustc_data_structures::stable_hasher::{
 use rustc_data_structures::sync::Lock;
 use rustc_macros::{symbols, Decodable, Encodable, HashStable_Generic};
 
-use std::fmt;
-use std::hash::{Hash, Hasher};
-use std::str;
-
 use crate::{with_session_globals, Edition, Span, DUMMY_SP};
 
 #[cfg(test)]
@@ -2446,13 +2445,11 @@ pub mod kw {
 /// Given that `sym` is imported, use them like `sym::symbol_name`.
 /// For example `sym::rustfmt` or `sym::u8`.
 pub mod sym {
-    use super::Symbol;
-
-    #[doc(inline)]
-    pub use super::sym_generated::*;
-
     // Used from a macro in `librustc_feature/accepted.rs`
     pub use super::kw::MacroRules as macro_rules;
+    #[doc(inline)]
+    pub use super::sym_generated::*;
+    use super::Symbol;
 
     /// Get the symbol for an integer.
     ///

compiler/rustc_span/src/symbol/tests.rs

@@ -1,5 +1,4 @@
 use super::*;
-
 use crate::create_default_session_globals_then;
 
 #[test]