Wrap each import in its own backticks (#346)

src/check_ast.rs

@@ -1721,12 +1721,8 @@ impl<'a> Checker<'a> {
                     let child = self.parents[defined_by];
                     let parent = defined_in.map(|defined_in| self.parents[defined_in]);
 
-                    let mut check = Check::new(
-                        CheckKind::UnusedImport(full_names.join(", ")),
-                        self.locate_check(Range::from_located(child)),
-                    );
-
-                    if matches!(self.autofix, fixer::Mode::Generate | fixer::Mode::Apply) {
+                    let fix = if matches!(self.autofix, fixer::Mode::Generate | fixer::Mode::Apply)
+                    {
                         let deleted: Vec<&Stmt> = self
                             .deletions
                             .iter()
@@ -1739,14 +1735,22 @@ impl<'a> Checker<'a> {
                         };
 
                         match removal_fn(&mut self.locator, &full_names, child, parent, &deleted) {
-                            Ok(fix) => {
-                                if fix.content.is_empty() || fix.content == "pass" {
-                                    self.deletions.insert(defined_by);
+                            Ok(fix) => Some(fix),
+                            Err(e) => {
+                                error!("Failed to fix unused imports: {}", e);
+                                None
                             }
-                                check.amend(fix)
-                            }
-                            Err(e) => error!("Failed to fix unused imports: {}", e),
                         }
+                    } else {
+                        None
+                    };
+
+                    let mut check = Check::new(
+                        CheckKind::UnusedImport(full_names.into_iter().map(String::from).collect()),
+                        self.locate_check(Range::from_located(child)),
+                    );
+                    if let Some(fix) = fix {
+                        check.amend(fix);
                     }
 
                     self.checks.push(check);

src/checks.rs

@@ -366,7 +366,7 @@ impl CheckCode {
             CheckCode::E902 => CheckKind::IOError("IOError: `...`".to_string()),
             CheckCode::E999 => CheckKind::SyntaxError("`...`".to_string()),
             // pyflakes
-            CheckCode::F401 => CheckKind::UnusedImport("...".to_string()),
+            CheckCode::F401 => CheckKind::UnusedImport(vec!["...".to_string()]),
             CheckCode::F402 => CheckKind::ImportShadowedByLoopVar("...".to_string(), 1),
             CheckCode::F403 => CheckKind::ImportStarUsed("...".to_string()),
             CheckCode::F404 => CheckKind::LateFutureImport,
@@ -476,7 +476,7 @@ pub enum CheckKind {
     UndefinedExport(String),
     UndefinedLocal(String),
     UndefinedName(String),
-    UnusedImport(String),
+    UnusedImport(Vec<String>),
     UnusedVariable(String),
     YieldOutsideFunction,
     // flake8-builtin
@@ -764,7 +764,10 @@ impl CheckKind {
             CheckKind::UndefinedName(name) => {
                 format!("Undefined name `{name}`")
             }
-            CheckKind::UnusedImport(name) => format!("`{name}` imported but unused"),
+            CheckKind::UnusedImport(names) => {
+                let names = names.iter().map(|name| format!("`{name}`")).join(", ");
+                format!("{names} imported but unused")
+            }
             CheckKind::UnusedVariable(name) => {
                 format!("Local variable `{name}` is assigned to but never used")
             }

src/snapshots/ruff__linter__tests__f401.snap

@@ -3,7 +3,8 @@ source: src/linter.rs
 expression: checks
 ---
 - kind:
-    UnusedImport: functools
+    UnusedImport:
+      - functools
   location:
     row: 2
     column: 1
@@ -20,7 +21,8 @@ expression: checks
       column: 21
     applied: false
 - kind:
-    UnusedImport: collections.OrderedDict
+    UnusedImport:
+      - collections.OrderedDict
   location:
     row: 4
     column: 1
@@ -37,7 +39,8 @@ expression: checks
       column: 2
     applied: false
 - kind:
-    UnusedImport: logging.handlers
+    UnusedImport:
+      - logging.handlers
   location:
     row: 12
     column: 1
@@ -54,7 +57,8 @@ expression: checks
       column: 24
     applied: false
 - kind:
-    UnusedImport: shelve
+    UnusedImport:
+      - shelve
   location:
     row: 33
     column: 5
@@ -71,7 +75,8 @@ expression: checks
       column: 1
     applied: false
 - kind:
-    UnusedImport: importlib
+    UnusedImport:
+      - importlib
   location:
     row: 34
     column: 5
@@ -79,16 +84,17 @@ expression: checks
     row: 34
     column: 21
   fix:
-    content: pass
+    content: ""
     location:
       row: 34
-      column: 5
+      column: 1
     end_location:
-      row: 34
-      column: 21
+      row: 35
+      column: 1
     applied: false
 - kind:
-    UnusedImport: pathlib
+    UnusedImport:
+      - pathlib
   location:
     row: 38
     column: 5
@@ -105,7 +111,8 @@ expression: checks
       column: 1
     applied: false
 - kind:
-    UnusedImport: pickle
+    UnusedImport:
+      - pickle
   location:
     row: 53
     column: 9

src/snapshots/ruff__linter__tests__future_annotations.snap

@@ -3,7 +3,8 @@ source: src/linter.rs
 expression: checks
 ---
 - kind:
-    UnusedImport: models.Nut
+    UnusedImport:
+      - models.Nut
   location:
     row: 5
     column: 1