style: Fix long lines in comments

why: Ensure all files pass ruff linting rules

what: - Break long comments into multiple lines in frozen_dataclass docstring - Split long comment lines in test_frozen_dataclass.py

Author: tony

src/libtmux/_internal/frozen_dataclass.py

@@ -102,8 +102,8 @@ def frozen_dataclass(cls: type[_T]) -> type[_T]:
     Traceback (most recent call last):
         ...
     AttributeError: SecureData is immutable: cannot modify field 'secret'
-    >>> # CAUTION: The _frozen attribute can be modified to bypass immutability protection
-    >>> # This is a known limitation of this implementation
+    >>> # CAUTION: The _frozen attribute can be modified to bypass immutability
+    >>> # protection. This is a known limitation of this implementation
     >>> data._frozen = False  # intentionally bypassing immutability
     >>> data.secret = "hacked"  # now works because object is no longer frozen
     >>> data.secret

tests/_internal/test_frozen_dataclass.py

@@ -80,20 +80,32 @@ def test_immutability() -> None:
         pane_id="pane123", width=80, height=24, captured_content=["Line1"]
     )
 
-    # Attempting to modify a field should raise AttributeError with precise error message
-    with pytest.raises(AttributeError, match=r"PaneSnapshot is immutable: cannot modify field 'width'"):
+    # Attempting to modify a field should raise AttributeError
+    # with precise error message
+    with pytest.raises(
+        AttributeError, match=r"PaneSnapshot is immutable: cannot modify field 'width'"
+    ):
         snapshot.width = 200  # type: ignore
 
-    # Attempting to add a new field should raise AttributeError with precise error message
-    with pytest.raises(AttributeError, match=r"PaneSnapshot is immutable: cannot modify field 'new_field'"):
+    # Attempting to add a new field should raise AttributeError
+    # with precise error message
+    with pytest.raises(
+        AttributeError,
+        match=r"PaneSnapshot is immutable: cannot modify field 'new_field'",
+    ):
         snapshot.new_field = "value"  # type: ignore
 
-    # Attempting to delete a field should raise AttributeError with precise error message
-    with pytest.raises(AttributeError, match=r"PaneSnapshot is immutable: cannot delete field 'width'"):
+    # Attempting to delete a field should raise AttributeError
+    # with precise error message
+    with pytest.raises(
+        AttributeError, match=r"PaneSnapshot is immutable: cannot delete field 'width'"
+    ):
         del snapshot.width
 
     # Calling a method that tries to modify state should fail
-    with pytest.raises(NotImplementedError, match=r"Snapshot is immutable. resize\(\) not allowed."):
+    with pytest.raises(
+        NotImplementedError, match=r"Snapshot is immutable. resize\(\) not allowed."
+    ):
         snapshot.resize(200, 50)
 
 
@@ -188,7 +200,7 @@ def test_bidirectional_references() -> None:
 
 class DimensionTestCase(t.NamedTuple):
     """Test fixture for validating dimensions in PaneSnapshot.
-    
+
     Note: This implementation intentionally allows any dimension values, including
     negative or extremely large values. In a real-world application, you might want
     to add validation to the class constructor if certain dimension ranges are required.
@@ -287,7 +299,7 @@ def test_frozen_flag(
     error_match: str | None,
 ) -> None:
     """Test behavior when attempting to manipulate the _frozen flag.
-    
+
     Note: We discovered that setting _frozen=False actually allows mutation,
     which could be a potential security issue if users know about this behavior.
     In a more secure implementation, the _frozen attribute might need additional