Auto merge of #125443 - nnethercote:rustfmt-use-decls, r=lcnr,cuviper,GuillaumeGomez

rustfmt `use` declarations

This PR implements https://github.com/rust-lang/compiler-team/issues/750, which changes how `use` declarations are formatted by adding these options to `rustfmt.toml`:
```
group_imports = "StdExternalCrate"
imports_granularity = "Module"
```

r? `@ghost`

1 files changed, 18 insertions, 21 deletions

diff --git a/compiler/rustc_codegen_ssa/src/back/write.rs b/compiler/rustc_codegen_ssa/src/back/write.rs
index 56e94529bc1..bea12747a51 100644
--- a/compiler/rustc_codegen_ssa/src/back/write.rs
+++ b/compiler/rustc_codegen_ssa/src/back/write.rs
@@ -1,12 +1,10 @@
-use super::link::{self, ensure_removed};
-use super::lto::{self, SerializedModule};
-use super::symbol_export::symbol_name_for_instance_in_crate;
+use std::any::Any;
+use std::marker::PhantomData;
+use std::path::{Path, PathBuf};
+use std::sync::mpsc::{channel, Receiver, Sender};
+use std::sync::Arc;
+use std::{fs, io, mem, str, thread};
 
-use crate::errors;
-use crate::traits::*;
-use crate::{
-    CachedModuleCodegen, CodegenResults, CompiledModule, CrateInfo, ModuleCodegen, ModuleKind,
-};
 use jobserver::{Acquired, Client};
 use rustc_ast::attr;
 use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
@@ -30,26 +28,25 @@ use rustc_middle::bug;
 use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
 use rustc_middle::middle::exported_symbols::SymbolExportInfo;
 use rustc_middle::ty::TyCtxt;
-use rustc_session::config::{self, CrateType, Lto, OutFileName, OutputFilenames, OutputType};
-use rustc_session::config::{Passes, SwitchWithOptPath};
+use rustc_session::config::{
+    self, CrateType, Lto, OutFileName, OutputFilenames, OutputType, Passes, SwitchWithOptPath,
+};
 use rustc_session::Session;
 use rustc_span::source_map::SourceMap;
 use rustc_span::symbol::sym;
 use rustc_span::{BytePos, FileName, InnerSpan, Pos, Span};
 use rustc_target::spec::{MergeFunctions, SanitizerSet};
+use tracing::debug;
 
+use super::link::{self, ensure_removed};
+use super::lto::{self, SerializedModule};
+use super::symbol_export::symbol_name_for_instance_in_crate;
 use crate::errors::ErrorCreatingRemarkDir;
-use std::any::Any;
-use std::fs;
-use std::io;
-use std::marker::PhantomData;
-use std::mem;
-use std::path::{Path, PathBuf};
-use std::str;
-use std::sync::mpsc::{channel, Receiver, Sender};
-use std::sync::Arc;
-use std::thread;
-use tracing::debug;
+use crate::traits::*;
+use crate::{
+    errors, CachedModuleCodegen, CodegenResults, CompiledModule, CrateInfo, ModuleCodegen,
+    ModuleKind,
+};
 
 const PRE_LTO_BC_EXT: &str = "pre-lto.bc";