Preserve empty lines between try clause headers (#6759)

crates/ruff_python_formatter/resources/test/fixtures/ruff/statement/try.py

@@ -146,3 +146,23 @@ except (
     # comment
 ):
     pass
+
+
+try:
+    pass
+
+finally:
+    pass
+
+
+try:
+    pass
+
+except ZeroDivisonError:
+    pass
+
+else:
+    pass
+
+finally:
+    pass

crates/ruff_python_formatter/src/statement/stmt_try.rs

@@ -105,9 +105,9 @@ impl FormatNodeRule<StmtTry> for FormatStmtTry {
 }
 
 fn format_case<'a>(
-    try_statement: &StmtTry,
+    try_statement: &'a StmtTry,
     kind: CaseKind,
-    previous_node: Option<&Stmt>,
+    previous_node: Option<&'a Stmt>,
     dangling_comments: &'a [SourceComment],
     f: &mut PyFormatter,
 ) -> FormatResult<(Option<&'a Stmt>, &'a [SourceComment])> {
@@ -141,9 +141,9 @@ fn format_case<'a>(
                 clause_body(body, trailing_case_comments),
             ]
         )?;
-        (None, rest)
+        (Some(last), rest)
     } else {
-        (None, dangling_comments)
+        (previous_node, dangling_comments)
     })
 }
 

crates/ruff_python_formatter/tests/snapshots/format@statement__try.py.snap

@@ -152,6 +152,26 @@ except (
     # comment
 ):
     pass
+
+
+try:
+    pass
+
+finally:
+    pass
+
+
+try:
+    pass
+
+except ZeroDivisonError:
+    pass
+
+else:
+    pass
+
+finally:
+    pass
 ```
 
 ## Output
@@ -320,6 +340,26 @@ except (
     # comment
 ):
     pass
+
+
+try:
+    pass
+
+finally:
+    pass
+
+
+try:
+    pass
+
+except ZeroDivisonError:
+    pass
+
+else:
+    pass
+
+finally:
+    pass
 ```