Fix use suggestion span

compiler/rustc_resolve/src/diagnostics.rs

@@ -5,10 +5,10 @@
 use rustc_ast::{self as ast, Crate, ItemKind, ModKind, NodeId, Path, CRATE_NODE_ID};
 use rustc_ast_pretty::pprust;
 use rustc_data_structures::fx::FxHashSet;
-use rustc_errors::struct_span_err;
 use rustc_errors::{
     pluralize, Applicability, Diagnostic, DiagnosticBuilder, ErrorGuaranteed, MultiSpan,
 };
+use rustc_errors::{struct_span_err, SuggestionStyle};
 use rustc_feature::BUILTIN_ATTRIBUTES;
 use rustc_hir::def::Namespace::{self, *};
 use rustc_hir::def::{self, CtorKind, CtorOf, DefKind, NonMacroAttrKind, PerNS};
@@ -2418,7 +2418,7 @@ fn show_candidates(
         }
 
         if let Some(span) = use_placement_span {
-            let add_use = match mode {
+            let (add_use, trailing) = match mode {
                 DiagnosticMode::Pattern => {
                     err.span_suggestions(
                         span,
@@ -2428,21 +2428,23 @@ fn show_candidates(
                     );
                     return;
                 }
-                DiagnosticMode::Import => "",
-                DiagnosticMode::Normal => "use ",
+                DiagnosticMode::Import => ("", ""),
+                DiagnosticMode::Normal => ("use ", ";\n"),
             };
             for candidate in &mut accessible_path_strings {
                 // produce an additional newline to separate the new use statement
                 // from the directly following item.
-                let additional_newline = if let FoundUse::Yes = found_use { "" } else { "\n" };
-                candidate.0 = format!("{add_use}{}{append};\n{additional_newline}", &candidate.0);
+                let additional_newline = if let FoundUse::No = found_use && let DiagnosticMode::Normal = mode { "\n" } else { "" };
+                candidate.0 =
+                    format!("{add_use}{}{append}{trailing}{additional_newline}", &candidate.0);
             }
 
-            err.span_suggestions(
+            err.span_suggestions_with_style(
                 span,
                 &msg,
                 accessible_path_strings.into_iter().map(|a| a.0),
                 Applicability::MaybeIncorrect,
+                SuggestionStyle::ShowAlways,
             );
             if let [first, .., last] = &path[..] {
                 let sp = first.ident.span.until(last.ident.span);

tests/ui/extenv/issue-55897.stderr

@@ -30,7 +30,7 @@ LL |     use env;
 help: consider importing this module instead
    |
 LL |     use std::env;
-   |         ~~~~~~~~~
+   |         ~~~~~~~~
 
 error: cannot determine resolution for the macro `env`
   --> $DIR/issue-55897.rs:6:22

tests/ui/imports/bad-import-with-rename.stderr

@@ -7,7 +7,7 @@ LL |     use crate::D::B as _;
 help: consider importing this type alias instead
    |
 LL |     use A::B as _;
-   |         ~~~~~~~~~~
+   |         ~~~~~~~~~
 
 error[E0432]: unresolved import `crate::D::B2`
   --> $DIR/bad-import-with-rename.rs:10:9
@@ -18,7 +18,7 @@ LL |     use crate::D::B2;
 help: consider importing this type alias instead
    |
 LL |     use A::B2;
-   |         ~~~~~~
+   |         ~~~~~
 
 error: aborting due to 2 previous errors
 

tests/ui/imports/issue-56125.stderr

@@ -7,13 +7,13 @@ LL |     use empty::issue_56125;
 help: consider importing one of these items instead
    |
 LL |     use crate::m3::last_segment::issue_56125;
-   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 LL |     use crate::m3::non_last_segment::non_last_segment::issue_56125;
-   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 LL |     use issue_56125::issue_56125;
-   |         ~~~~~~~~~~~~~~~~~~~~~~~~~
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~
 LL |     use issue_56125::last_segment::issue_56125;
-   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+   |         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      and 1 other candidate
 
 error[E0659]: `issue_56125` is ambiguous

tests/ui/imports/issue-57015.stderr

@@ -7,7 +7,7 @@ LL | use single_err::something;
 help: consider importing this module instead
    |
 LL | use glob_ok::something;
-   |     ~~~~~~~~~~~~~~~~~~~
+   |     ~~~~~~~~~~~~~~~~~~
 
 error: aborting due to previous error
 

tests/ui/rfc-2126-extern-absolute-paths/not-allowed.stderr

@@ -7,9 +7,9 @@ LL | use alloc;
 help: consider importing one of these items instead
    |
 LL | use core::alloc;
-   |     ~~~~~~~~~~~~
-LL | use std::alloc;
    |     ~~~~~~~~~~~
+LL | use std::alloc;
+   |     ~~~~~~~~~~
 
 error: aborting due to previous error
 

tests/ui/simd/portable-intrinsics-arent-exposed.stderr

@@ -15,7 +15,7 @@ LL | use std::simd::intrinsics;
 help: consider importing this module instead
    |
 LL | use std::intrinsics;
-   |     ~~~~~~~~~~~~~~~~
+   |     ~~~~~~~~~~~~~~~
 
 error: aborting due to 2 previous errors
 

tests/ui/test-attrs/inaccessible-test-modules.stderr

@@ -13,7 +13,7 @@ LL | use test as y;
 help: consider importing this module instead
    |
 LL | use test::test as y;
-   |     ~~~~~~~~~~~~~~~~
+   |     ~~~~~~~~~~~~~~~
 
 error: aborting due to 2 previous errors
 

tests/ui/unresolved/unresolved-candidates.stderr

@@ -7,7 +7,7 @@ LL |     use Trait;
 help: consider importing this trait instead
    |
 LL |     use a::Trait;
-   |         ~~~~~~~~~
+   |         ~~~~~~~~
 
 error[E0405]: cannot find trait `Trait` in this scope
   --> $DIR/unresolved-candidates.rs:10:10