Fix D209 D400 conflict

crates/ruff/src/autofix/mod.rs

@@ -9,7 +9,7 @@ use ruff_python_ast::source_code::Locator;
 use ruff_python_ast::types::Range;
 
 use crate::linter::FixTable;
-use crate::registry::AsRule;
+use crate::registry::{AsRule, Rule};
 
 pub mod helpers;
 
@@ -22,6 +22,17 @@ pub fn fix_file(diagnostics: &[Diagnostic], locator: &Locator) -> Option<(String
     }
 }
 
+pub fn cmp_fix(rule1: Rule, rule2: Rule, fix1: &Fix, fix2: &Fix) -> std::cmp::Ordering {
+    match fix1.location.cmp(&fix2.location) {
+        std::cmp::Ordering::Equal => match (rule1, rule2) {
+            (Rule::EndsInPeriod, Rule::NewLineAfterLastParagraph) => std::cmp::Ordering::Less,
+            (Rule::NewLineAfterLastParagraph, Rule::EndsInPeriod) => std::cmp::Ordering::Greater,
+            _ => std::cmp::Ordering::Equal,
+        },
+        other => other,
+    }
+}
+
 /// Apply a series of fixes.
 fn apply_fixes<'a>(
     diagnostics: impl Iterator<Item = &'a Diagnostic>,
@@ -39,7 +50,7 @@ fn apply_fixes<'a>(
                 .as_ref()
                 .map(|fix| (diagnostic.kind.rule(), fix))
         })
-        .sorted_by_key(|(.., fix)| fix.location)
+        .sorted_by(|(rule1, fix1), (rule2, fix2)| cmp_fix(*rule1, *rule2, fix1, fix2))
     {
         // If we already applied an identical fix as part of another correction, skip
         // any re-application.

crates/ruff/src/rules/pydocstyle/snapshots/ruff__rules__pydocstyle__tests__d209_d400.snap

@@ -42,24 +42,4 @@ expression: diagnostics
       row: 3
       column: 69
   parent: ~
-- kind:
-    name: NewLineAfterLastParagraph
-    body: Multi-line docstring closing quotes should be on a separate line
-    suggestion: Move closing quotes to new line
-    fixable: true
-  location:
-    row: 2
-    column: 4
-  end_location:
-    row: 4
-    column: 8
-  fix:
-    content: "\n    "
-    location:
-      row: 4
-      column: 5
-    end_location:
-      row: 4
-      column: 5
-  parent: ~