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, 3 insertions, 3 deletions

diff --git a/src/librustdoc/html/render/span_map.rs b/src/librustdoc/html/render/span_map.rs
index 0535246ae10..5b53277c059 100644
--- a/src/librustdoc/html/render/span_map.rs
+++ b/src/librustdoc/html/render/span_map.rs
@@ -1,5 +1,4 @@
-use crate::clean::{self, rustc_span, PrimitiveType};
-use crate::html::sources;
+use std::path::{Path, PathBuf};
 
 use rustc_data_structures::fx::FxHashMap;
 use rustc_hir::def::{DefKind, Res};
@@ -11,7 +10,8 @@ use rustc_middle::ty::TyCtxt;
 use rustc_span::hygiene::MacroKind;
 use rustc_span::{BytePos, ExpnKind, Span};
 
-use std::path::{Path, PathBuf};
+use crate::clean::{self, rustc_span, PrimitiveType};
+use crate::html::sources;
 
 /// This enum allows us to store two different kinds of information:
 ///