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, 12 insertions, 13 deletions

diff --git a/compiler/rustc_codegen_llvm/src/llvm_util.rs b/compiler/rustc_codegen_llvm/src/llvm_util.rs
index 4d56d1d3b1a..dc21b92a95f 100644
--- a/compiler/rustc_codegen_llvm/src/llvm_util.rs
+++ b/compiler/rustc_codegen_llvm/src/llvm_util.rs
@@ -1,9 +1,9 @@
-use crate::back::write::create_informational_target_machine;
-use crate::errors::{
-    FixedX18InvalidArch, InvalidTargetFeaturePrefix, PossibleFeature, TargetFeatureDisableOrEnable,
-    UnknownCTargetFeature, UnknownCTargetFeaturePrefix, UnstableCTargetFeature,
-};
-use crate::llvm;
+use std::ffi::{c_char, c_void, CStr, CString};
+use std::fmt::Write;
+use std::path::Path;
+use std::sync::Once;
+use std::{ptr, slice, str};
+
 use libc::c_int;
 use rustc_codegen_ssa::base::wants_wasm_eh;
 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
@@ -16,13 +16,12 @@ use rustc_span::symbol::Symbol;
 use rustc_target::spec::{MergeFunctions, PanicStrategy};
 use rustc_target::target_features::{RUSTC_SPECIAL_FEATURES, RUSTC_SPECIFIC_FEATURES};
 
-use std::ffi::{c_char, c_void, CStr, CString};
-use std::fmt::Write;
-use std::path::Path;
-use std::ptr;
-use std::slice;
-use std::str;
-use std::sync::Once;
+use crate::back::write::create_informational_target_machine;
+use crate::errors::{
+    FixedX18InvalidArch, InvalidTargetFeaturePrefix, PossibleFeature, TargetFeatureDisableOrEnable,
+    UnknownCTargetFeature, UnknownCTargetFeaturePrefix, UnstableCTargetFeature,
+};
+use crate::llvm;
 
 static INIT: Once = Once::new();