Avoid nested quotations in auto-quoting fix

crates/ruff_linter/resources/test/fixtures/flake8_type_checking/quote.py

@@ -87,3 +87,6 @@ class C:
         x: DataFrame[
             int
         ] = 1
+
+    def func() -> DataFrame[[DataFrame[_P, _R]], DataFrame[_P, _R]]:
+        ...

crates/ruff_linter/src/rules/flake8_type_checking/helpers.rs

@@ -235,3 +235,17 @@ pub(crate) fn quote_annotation(
         expr.range(),
     ))
 }
+
+/// Filter out any [`Edit`]s that are completely contained by any other [`Edit`].
+pub(crate) fn filter_contained(edits: Vec<Edit>) -> Vec<Edit> {
+    let mut filtered: Vec<Edit> = Vec::with_capacity(edits.len());
+    for edit in edits {
+        if filtered
+            .iter()
+            .all(|filtered_edit| !filtered_edit.range().contains_range(edit.range()))
+        {
+            filtered.push(edit);
+        }
+    }
+    filtered
+}

crates/ruff_linter/src/rules/flake8_type_checking/rules/runtime_import_in_type_checking_block.rs

@@ -1,7 +1,6 @@
 use std::borrow::Cow;
 
 use anyhow::Result;
-use itertools::Itertools;
 use rustc_hash::FxHashMap;
 
 use ruff_diagnostics::{Diagnostic, Fix, FixAvailability, Violation};
@@ -13,7 +12,7 @@ use crate::checkers::ast::Checker;
 use crate::codes::Rule;
 use crate::fix;
 use crate::importer::ImportedMembers;
-use crate::rules::flake8_type_checking::helpers::quote_annotation;
+use crate::rules::flake8_type_checking::helpers::{filter_contained, quote_annotation};
 use crate::rules::flake8_type_checking::imports::ImportBinding;
 
 /// ## What it does
@@ -263,27 +262,29 @@ pub(crate) fn runtime_import_in_type_checking_block(
 
 /// Generate a [`Fix`] to quote runtime usages for imports in a type-checking block.
 fn quote_imports(checker: &Checker, node_id: NodeId, imports: &[ImportBinding]) -> Result<Fix> {
-    let quote_reference_edits = imports
-        .iter()
-        .flat_map(|ImportBinding { binding, .. }| {
-            binding.references.iter().filter_map(|reference_id| {
-                let reference = checker.semantic().reference(*reference_id);
-                if reference.context().is_runtime() {
-                    Some(quote_annotation(
-                        reference.expression_id()?,
-                        checker.semantic(),
-                        checker.locator(),
-                        checker.stylist(),
-                        checker.generator(),
-                    ))
-                } else {
-                    None
-                }
+    let quote_reference_edits = filter_contained(
+        imports
+            .iter()
+            .flat_map(|ImportBinding { binding, .. }| {
+                binding.references.iter().filter_map(|reference_id| {
+                    let reference = checker.semantic().reference(*reference_id);
+                    if reference.context().is_runtime() {
+                        Some(quote_annotation(
+                            reference.expression_id()?,
+                            checker.semantic(),
+                            checker.locator(),
+                            checker.stylist(),
+                            checker.generator(),
+                        ))
+                    } else {
+                        None
+                    }
+                })
             })
-        })
-        .collect::<Result<Vec<_>>>()?;
+            .collect::<Result<Vec<_>>>()?,
+    );
 
-    let mut rest = quote_reference_edits.into_iter().unique();
+    let mut rest = quote_reference_edits.into_iter();
     let head = rest.next().expect("Expected at least one reference");
     Ok(Fix::unsafe_edits(head, rest).isolate(Checker::isolation(
         checker.semantic().parent_statement_id(node_id),

crates/ruff_linter/src/rules/flake8_type_checking/rules/typing_only_runtime_import.rs

@@ -1,7 +1,6 @@
 use std::borrow::Cow;
 
 use anyhow::Result;
-use itertools::Itertools;
 use rustc_hash::FxHashMap;
 
 use ruff_diagnostics::{Diagnostic, DiagnosticKind, Fix, FixAvailability, Violation};
@@ -13,7 +12,9 @@ use crate::checkers::ast::Checker;
 use crate::codes::Rule;
 use crate::fix;
 use crate::importer::ImportedMembers;
-use crate::rules::flake8_type_checking::helpers::{is_typing_reference, quote_annotation};
+use crate::rules::flake8_type_checking::helpers::{
+    filter_contained, is_typing_reference, quote_annotation,
+};
 use crate::rules::flake8_type_checking::imports::ImportBinding;
 use crate::rules::isort::{categorize, ImportSection, ImportType};
 
@@ -483,32 +484,34 @@ fn fix_imports(checker: &Checker, node_id: NodeId, imports: &[ImportBinding]) ->
     )?;
 
     // Step 3) Quote any runtime usages of the referenced symbol.
-    let quote_reference_edits = imports
-        .iter()
-        .flat_map(|ImportBinding { binding, .. }| {
-            binding.references.iter().filter_map(|reference_id| {
-                let reference = checker.semantic().reference(*reference_id);
-                if reference.context().is_runtime() {
-                    Some(quote_annotation(
-                        reference.expression_id()?,
-                        checker.semantic(),
-                        checker.locator(),
-                        checker.stylist(),
-                        checker.generator(),
-                    ))
-                } else {
-                    None
-                }
+    let quote_reference_edits = filter_contained(
+        imports
+            .iter()
+            .flat_map(|ImportBinding { binding, .. }| {
+                binding.references.iter().filter_map(|reference_id| {
+                    let reference = checker.semantic().reference(*reference_id);
+                    if reference.context().is_runtime() {
+                        Some(quote_annotation(
+                            reference.expression_id()?,
+                            checker.semantic(),
+                            checker.locator(),
+                            checker.stylist(),
+                            checker.generator(),
+                        ))
+                    } else {
+                        None
+                    }
+                })
             })
-        })
-        .collect::<Result<Vec<_>>>()?;
+            .collect::<Result<Vec<_>>>()?,
+    );
 
     Ok(Fix::unsafe_edits(
         remove_import_edit,
         add_import_edit
             .into_edits()
             .into_iter()
-            .chain(quote_reference_edits.into_iter().unique()),
+            .chain(quote_reference_edits.into_iter()),
     )
     .isolate(Checker::isolation(
         checker.semantic().parent_statement_id(node_id),

crates/ruff_linter/src/rules/flake8_type_checking/snapshots/ruff_linter__rules__flake8_type_checking__tests__quote_typing-only-third-party-import_quote.py.snap

@@ -292,6 +292,10 @@ quote.py:78:24: TCH002 [*] Move third-party import `pandas.DataFrame` into a typ
 88    |-            int
 89    |-        ] = 1
    89 |+        x: "DataFrame[int]" = 1
+90 90 | 
+91    |-    def func() -> DataFrame[[DataFrame[_P, _R]], DataFrame[_P, _R]]:
+   91 |+    def func() -> "DataFrame[[DataFrame[_P, _R]], DataFrame[_P, _R]]":
+92 92 |         ...
 
 quote.py:78:35: TCH002 [*] Move third-party import `pandas.Series` into a type-checking block
    |
@@ -329,5 +333,9 @@ quote.py:78:35: TCH002 [*] Move third-party import `pandas.Series` into a type-c
 88    |-            int
 89    |-        ] = 1
    89 |+        x: "DataFrame[int]" = 1
+90 90 | 
+91    |-    def func() -> DataFrame[[DataFrame[_P, _R]], DataFrame[_P, _R]]:
+   91 |+    def func() -> "DataFrame[[DataFrame[_P, _R]], DataFrame[_P, _R]]":
+92 92 |         ...