Fix parenthesizing of implicit strings (#6852)

crates/ruff_python_formatter/resources/test/fixtures/ruff/expression/string.py

@@ -124,3 +124,9 @@ test_particular = [
     'c'
     )
 }
+
+
+# Regression test for https://github.com/astral-sh/ruff/issues/5893
+x = ("""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa""" """bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb""")
+x = (f"""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa""" f"""bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb""")
+x = (b"""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa""" b"""bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb""")

crates/ruff_python_formatter/src/expression/expr_constant.rs

@@ -79,14 +79,14 @@ impl NeedsParentheses for ExprConstant {
         _parent: AnyNodeRef,
         context: &PyFormatContext,
     ) -> OptionalParentheses {
-        if is_multiline_string(self, context.source())
+        if self.value.is_implicit_concatenated() {
+            OptionalParentheses::Multiline
+        } else if is_multiline_string(self, context.source())
             || self.value.is_none()
             || self.value.is_bool()
             || self.value.is_ellipsis()
         {
             OptionalParentheses::Never
-        } else if self.value.is_implicit_concatenated() {
-            OptionalParentheses::Multiline
         } else if should_use_best_fit(self, context) {
             OptionalParentheses::BestFit
         } else {

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

@@ -130,6 +130,12 @@ test_particular = [
     'c'
     )
 }
+
+
+# Regression test for https://github.com/astral-sh/ruff/issues/5893
+x = ("""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa""" """bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb""")
+x = (f"""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa""" f"""bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb""")
+x = (b"""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa""" b"""bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb""")
 ```
 
 ## Outputs
@@ -284,6 +290,21 @@ test_particular = [
 
 # Parenthesized string continuation with messed up indentation
 {"key": ([], "a" "b" "c")}
+
+
+# Regression test for https://github.com/astral-sh/ruff/issues/5893
+x = (
+    """aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"""
+    """bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"""
+)
+x = (
+    f"""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"""
+    f"""bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"""
+)
+x = (
+    b"""aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"""
+    b"""bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"""
+)
 ```
 
 
@@ -438,6 +459,21 @@ test_particular = [
 
 # Parenthesized string continuation with messed up indentation
 {'key': ([], 'a' 'b' 'c')}
+
+
+# Regression test for https://github.com/astral-sh/ruff/issues/5893
+x = (
+    '''aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'''
+    '''bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb'''
+)
+x = (
+    f'''aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'''
+    f'''bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb'''
+)
+x = (
+    b'''aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'''
+    b'''bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb'''
+)
 ```