chore: avoid subclassing dict, list and str

Identified by subclass-builtin (FURB189) ruff check.

weblate/trans/checklists.py

@@ -2,10 +2,12 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+from collections import UserList
+
 from weblate.trans.filter import FILTERS
 
 
-class TranslationChecklist(list):
+class TranslationChecklist(UserList):
     """Simple list wrapper for translation checklist."""
 
     def add_if(self, stats, name, level) -> None:

weblate/trans/models/project.py

@@ -6,6 +6,7 @@
 
 import os
 import os.path
+from collections import UserDict
 from datetime import datetime
 from operator import itemgetter
 from typing import TYPE_CHECKING
@@ -48,8 +49,9 @@
     from weblate.trans.models.translation import TranslationQuerySet
 
 
-class ProjectLanguageFactory(dict):
+class ProjectLanguageFactory(UserDict):
     def __init__(self, project: Project) -> None:
+        super().__init__()
         self._project = project
 
     def __getitem__(self, key: Language):

weblate/utils/render.py

@@ -4,6 +4,7 @@
 
 from __future__ import annotations
 
+from collections import UserString
 from typing import TYPE_CHECKING
 
 from django.conf import settings
@@ -20,9 +21,7 @@
     from django.core.validators import URLValidator
 
 
-class InvalidString(str):
-    __slots__ = ()
-
+class InvalidString(UserString):
     def __mod__(self, other: str):
         raise TemplateSyntaxError(gettext('Undefined variable: "%s"') % other)