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, 7 insertions, 7 deletions

diff --git a/compiler/rustc_incremental/src/assert_dep_graph.rs b/compiler/rustc_incremental/src/assert_dep_graph.rs
index 41caa5d4765..b29ba59c9f3 100644
--- a/compiler/rustc_incremental/src/assert_dep_graph.rs
+++ b/compiler/rustc_incremental/src/assert_dep_graph.rs
@@ -33,12 +33,12 @@
 //! fn baz() { foo(); }
 //! ```
 
-use crate::errors;
-use rustc_ast as ast;
+use std::env;
+use std::fs::{self, File};
+use std::io::{BufWriter, Write};
+
 use rustc_data_structures::fx::FxIndexSet;
 use rustc_data_structures::graph::implementation::{Direction, NodeIndex, INCOMING, OUTGOING};
-use rustc_graphviz as dot;
-use rustc_hir as hir;
 use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_ID};
 use rustc_hir::intravisit::{self, Visitor};
 use rustc_middle::dep_graph::{
@@ -49,10 +49,10 @@ use rustc_middle::ty::TyCtxt;
 use rustc_middle::{bug, span_bug};
 use rustc_span::symbol::{sym, Symbol};
 use rustc_span::Span;
-use std::env;
-use std::fs::{self, File};
-use std::io::{BufWriter, Write};
 use tracing::debug;
+use {rustc_ast as ast, rustc_graphviz as dot, rustc_hir as hir};
+
+use crate::errors;
 
 #[allow(missing_docs)]
 pub fn assert_dep_graph(tcx: TyCtxt<'_>) {