!squash frozen dataclass sealable fix docstrings

Author: tony

src/libtmux/_internal/frozen_dataclass_sealable.py

@@ -6,20 +6,24 @@
 standard dataclasses module, with the following features:
 
 1. Field-level mutability control:
-   - Use the `mutable_during_init` decorator to mark fields that should be mutable
-     during the initialization phase but become immutable after sealing.
+
+   Use the `mutable_during_init` decorator to mark fields that should be mutable
+   during the initialization phase but become immutable after sealing.
 
 2. Two-phase initialization:
+
    - Objects start in an "initializing" state where designated fields can be modified.
    - Objects can be explicitly sealed to prevent further modification of any fields.
 
 3. Circular reference support:
-   - Create objects, establish circular references between them, then seal
-     them together.
+
+   Create objects, establish circular references between them, then seal
+   them together.
 
 4. Backward compatibility:
-   - Objects are immutable by default, sealing occurs automatically at the end of
-     initialization unless explicitly deferred.
+
+   Objects are immutable by default, sealing occurs automatically at the end of
+   initialization unless explicitly deferred.
 
 Limitations: