Add autofix for D300 (#7967)

## Summary

Add fix for `D300`

## Test Plan

`cargo test` and manually

crates/ruff_linter/resources/test/fixtures/pydocstyle/D300.py

@@ -0,0 +1,10 @@
+def with_backslash():
+    """Sum\\mary."""
+
+
+def ends_in_quote():
+    'Sum\\mary."'
+
+
+def contains_quote():
+    'Sum"\\mary.'

crates/ruff_linter/src/rules/pydocstyle/mod.rs

@@ -87,6 +87,7 @@ mod tests {
     #[test_case(Rule::EscapeSequenceInDocstring, Path::new("D.py"))]
     #[test_case(Rule::EscapeSequenceInDocstring, Path::new("D301.py"))]
     #[test_case(Rule::TripleSingleQuotes, Path::new("D.py"))]
+    #[test_case(Rule::TripleSingleQuotes, Path::new("D300.py"))]
     fn rules(rule_code: Rule, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", rule_code.noqa_code(), path.to_string_lossy());
         let diagnostics = test_path(

crates/ruff_linter/src/rules/pydocstyle/rules/triple_quotes.rs

@@ -1,4 +1,4 @@
-use ruff_diagnostics::{Diagnostic, Violation};
+use ruff_diagnostics::{Diagnostic, Edit, Fix, FixAvailability, Violation};
 use ruff_macros::{derive_message_formats, violation};
 use ruff_python_codegen::Quote;
 use ruff_text_size::Ranged;
@@ -37,6 +37,8 @@ pub struct TripleSingleQuotes {
 }
 
 impl Violation for TripleSingleQuotes {
+    const FIX_AVAILABILITY: FixAvailability = FixAvailability::Sometimes;
+
     #[derive_message_formats]
     fn message(&self) -> String {
         let TripleSingleQuotes { expected_quote } = self;
@@ -45,12 +47,25 @@ impl Violation for TripleSingleQuotes {
             Quote::Single => format!(r#"Use triple single quotes `'''`"#),
         }
     }
+
+    fn fix_title(&self) -> Option<String> {
+        let TripleSingleQuotes { expected_quote } = self;
+        Some(match expected_quote {
+            Quote::Double => format!("Convert to triple double quotes"),
+            Quote::Single => format!("Convert to triple single quotes"),
+        })
+    }
 }
 
 /// D300
 pub(crate) fn triple_quotes(checker: &mut Checker, docstring: &Docstring) {
     let leading_quote = docstring.leading_quote();
 
+    let prefixes = docstring
+        .leading_quote()
+        .trim_end_matches(|c| c == '\'' || c == '"')
+        .to_owned();
+
     let expected_quote = if docstring.body().contains("\"\"\"") {
         Quote::Single
     } else {
@@ -60,18 +75,34 @@ pub(crate) fn triple_quotes(checker: &mut Checker, docstring: &Docstring) {
     match expected_quote {
         Quote::Single => {
             if !leading_quote.ends_with("'''") {
-                checker.diagnostics.push(Diagnostic::new(
-                    TripleSingleQuotes { expected_quote },
-                    docstring.range(),
-                ));
+                let mut diagnostic =
+                    Diagnostic::new(TripleSingleQuotes { expected_quote }, docstring.range());
+
+                let body = docstring.body().as_str();
+                if !body.ends_with('\'') {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::range_replacement(
+                        format!("{prefixes}'''{body}'''"),
+                        docstring.range(),
+                    )));
+                }
+
+                checker.diagnostics.push(diagnostic);
             }
         }
         Quote::Double => {
             if !leading_quote.ends_with("\"\"\"") {
-                checker.diagnostics.push(Diagnostic::new(
-                    TripleSingleQuotes { expected_quote },
-                    docstring.range(),
-                ));
+                let mut diagnostic =
+                    Diagnostic::new(TripleSingleQuotes { expected_quote }, docstring.range());
+
+                let body = docstring.body().as_str();
+                if !body.ends_with('"') {
+                    diagnostic.set_fix(Fix::safe_edit(Edit::range_replacement(
+                        format!("{prefixes}\"\"\"{body}\"\"\""),
+                        docstring.range(),
+                    )));
+                }
+
+                checker.diagnostics.push(diagnostic);
             }
         }
     }

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D300_D.py.snap

@@ -1,47 +1,102 @@
 ---
 source: crates/ruff_linter/src/rules/pydocstyle/mod.rs
 ---
-D.py:307:5: D300 Use triple double quotes `"""`
+D.py:307:5: D300 [*] Use triple double quotes `"""`
     |
 305 | @expect('D300: Use """triple double quotes""" (found \'\'\'-quotes)')
 306 | def triple_single_quotes_raw():
 307 |     r'''Summary.'''
     |     ^^^^^^^^^^^^^^^ D300
     |
+    = help: Convert to triple double quotes
 
-D.py:312:5: D300 Use triple double quotes `"""`
+ℹ Fix
+304 304 | 
+305 305 | @expect('D300: Use """triple double quotes""" (found \'\'\'-quotes)')
+306 306 | def triple_single_quotes_raw():
+307     |-    r'''Summary.'''
+    307 |+    r"""Summary."""
+308 308 | 
+309 309 | 
+310 310 | @expect('D300: Use """triple double quotes""" (found \'\'\'-quotes)')
+
+D.py:312:5: D300 [*] Use triple double quotes `"""`
     |
 310 | @expect('D300: Use """triple double quotes""" (found \'\'\'-quotes)')
 311 | def triple_single_quotes_raw_uppercase():
 312 |     R'''Summary.'''
     |     ^^^^^^^^^^^^^^^ D300
     |
+    = help: Convert to triple double quotes
+
+ℹ Fix
+309 309 | 
+310 310 | @expect('D300: Use """triple double quotes""" (found \'\'\'-quotes)')
+311 311 | def triple_single_quotes_raw_uppercase():
+312     |-    R'''Summary.'''
+    312 |+    R"""Summary."""
+313 313 | 
+314 314 | 
+315 315 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
 
-D.py:317:5: D300 Use triple double quotes `"""`
+D.py:317:5: D300 [*] Use triple double quotes `"""`
     |
 315 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
 316 | def single_quotes_raw():
 317 |     r'Summary.'
     |     ^^^^^^^^^^^ D300
     |
+    = help: Convert to triple double quotes
+
+ℹ Fix
+314 314 | 
+315 315 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
+316 316 | def single_quotes_raw():
+317     |-    r'Summary.'
+    317 |+    r"""Summary."""
+318 318 | 
+319 319 | 
+320 320 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
 
-D.py:322:5: D300 Use triple double quotes `"""`
+D.py:322:5: D300 [*] Use triple double quotes `"""`
     |
 320 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
 321 | def single_quotes_raw_uppercase():
 322 |     R'Summary.'
     |     ^^^^^^^^^^^ D300
     |
+    = help: Convert to triple double quotes
 
-D.py:328:5: D300 Use triple double quotes `"""`
+ℹ Fix
+319 319 | 
+320 320 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
+321 321 | def single_quotes_raw_uppercase():
+322     |-    R'Summary.'
+    322 |+    R"""Summary."""
+323 323 | 
+324 324 | 
+325 325 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
+
+D.py:328:5: D300 [*] Use triple double quotes `"""`
     |
 326 | @expect('D301: Use r""" if any backslashes in a docstring')
 327 | def single_quotes_raw_uppercase_backslash():
 328 |     R'Sum\mary.'
     |     ^^^^^^^^^^^^ D300
     |
+    = help: Convert to triple double quotes
+
+ℹ Fix
+325 325 | @expect('D300: Use """triple double quotes""" (found \'-quotes)')
+326 326 | @expect('D301: Use r""" if any backslashes in a docstring')
+327 327 | def single_quotes_raw_uppercase_backslash():
+328     |-    R'Sum\mary.'
+    328 |+    R"""Sum\mary."""
+329 329 | 
+330 330 | 
+331 331 | @expect('D301: Use r""" if any backslashes in a docstring')
 
-D.py:645:5: D300 Use triple double quotes `"""`
+D.py:645:5: D300 [*] Use triple double quotes `"""`
     |
 644 |   def single_line_docstring_with_an_escaped_backslash():
 645 |       "\
@@ -51,39 +106,95 @@ D.py:645:5: D300 Use triple double quotes `"""`
 647 |   
 648 |   class StatementOnSameLineAsDocstring:
     |
+    = help: Convert to triple double quotes
 
-D.py:649:5: D300 Use triple double quotes `"""`
+ℹ Fix
+642 642 | 
+643 643 | 
+644 644 | def single_line_docstring_with_an_escaped_backslash():
+645     |-    "\
+646     |-    "
+    645 |+    """\
+    646 |+    """
+647 647 | 
+648 648 | class StatementOnSameLineAsDocstring:
+649 649 |     "After this docstring there's another statement on the same line separated by a semicolon." ; priorities=1
+
+D.py:649:5: D300 [*] Use triple double quotes `"""`
     |
 648 | class StatementOnSameLineAsDocstring:
 649 |     "After this docstring there's another statement on the same line separated by a semicolon." ; priorities=1
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ D300
 650 |     def sort_services(self):
 651 |         pass
     |
+    = help: Convert to triple double quotes
+
+ℹ Fix
+646 646 |     "
+647 647 | 
+648 648 | class StatementOnSameLineAsDocstring:
+649     |-    "After this docstring there's another statement on the same line separated by a semicolon." ; priorities=1
+    649 |+    """After this docstring there's another statement on the same line separated by a semicolon.""" ; priorities=1
+650 650 |     def sort_services(self):
+651 651 |         pass
+652 652 | 
 
-D.py:654:5: D300 Use triple double quotes `"""`
+D.py:654:5: D300 [*] Use triple double quotes `"""`
     |
 653 | class StatementOnSameLineAsDocstring:
 654 |     "After this docstring there's another statement on the same line separated by a semicolon."; priorities=1
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ D300
     |
+    = help: Convert to triple double quotes
+
+ℹ Fix
+651 651 |         pass
+652 652 | 
+653 653 | class StatementOnSameLineAsDocstring:
+654     |-    "After this docstring there's another statement on the same line separated by a semicolon."; priorities=1
+    654 |+    """After this docstring there's another statement on the same line separated by a semicolon."""; priorities=1
+655 655 | 
+656 656 | 
+657 657 | class CommentAfterDocstring:
 
-D.py:658:5: D300 Use triple double quotes `"""`
+D.py:658:5: D300 [*] Use triple double quotes `"""`
     |
 657 | class CommentAfterDocstring:
 658 |     "After this docstring there's a comment."  # priorities=1
     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ D300
 659 |     def sort_services(self):
 660 |         pass
     |
+    = help: Convert to triple double quotes
 
-D.py:664:5: D300 Use triple double quotes `"""`
+ℹ Fix
+655 655 | 
+656 656 | 
+657 657 | class CommentAfterDocstring:
+658     |-    "After this docstring there's a comment."  # priorities=1
+    658 |+    """After this docstring there's a comment."""  # priorities=1
+659 659 |     def sort_services(self):
+660 660 |         pass
+661 661 | 
+
+D.py:664:5: D300 [*] Use triple double quotes `"""`
     |
 663 |   def newline_after_closing_quote(self):
 664 |       "We enforce a newline after the closing quote for a multi-line docstring \
     |  _____^
 665 | |     but continuations shouldn't be considered multi-line"
     | |_________________________________________________________^ D300
     |
+    = help: Convert to triple double quotes
+
+ℹ Fix
+661 661 | 
+662 662 | 
+663 663 | def newline_after_closing_quote(self):
+664     |-    "We enforce a newline after the closing quote for a multi-line docstring \
+665     |-    but continuations shouldn't be considered multi-line"
+    664 |+    """We enforce a newline after the closing quote for a multi-line docstring \
+    665 |+    but continuations shouldn't be considered multi-line"""
 
 

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__D300_D300.py.snap

@@ -0,0 +1,27 @@
+---
+source: crates/ruff_linter/src/rules/pydocstyle/mod.rs
+---
+D300.py:6:5: D300 Use triple double quotes `"""`
+  |
+5 | def ends_in_quote():
+6 |     'Sum\\mary."'
+  |     ^^^^^^^^^^^^^ D300
+  |
+  = help: Convert to triple double quotes
+
+D300.py:10:5: D300 [*] Use triple double quotes `"""`
+   |
+ 9 | def contains_quote():
+10 |     'Sum"\\mary.'
+   |     ^^^^^^^^^^^^^ D300
+   |
+   = help: Convert to triple double quotes
+
+ℹ Fix
+7  7  | 
+8  8  | 
+9  9  | def contains_quote():
+10    |-    'Sum"\\mary.'
+   10 |+    """Sum"\\mary."""
+
+

crates/ruff_linter/src/rules/pydocstyle/snapshots/ruff_linter__rules__pydocstyle__tests__bom.snap

@@ -1,10 +1,15 @@
 ---
 source: crates/ruff_linter/src/rules/pydocstyle/mod.rs
 ---
-bom.py:1:1: D300 Use triple double quotes `"""`
+bom.py:1:1: D300 [*] Use triple double quotes `"""`
   |
 1 | ''' SAM macro definitions '''
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ D300
   |
+  = help: Convert to triple double quotes
+
+ℹ Fix
+1   |-''' SAM macro definitions '''
+  1 |+""" SAM macro definitions """