Revert to single quotes

Author: ksunden

lib/matplotlib/tests/test_getattr.py

@@ -9,15 +9,15 @@
 module_names = [
     m.name
     for m in walk_packages(
-        path=matplotlib.__path__, prefix=f"{matplotlib.__name__}."
+        path=matplotlib.__path__, prefix=f'{matplotlib.__name__}.'
     )
     if not m.name.startswith(__package__)
-    and not any(x.startswith("_") for x in m.name.split("."))
+    and not any(x.startswith('_') for x in m.name.split('.'))
 ]
 
 
-@pytest.mark.parametrize("module_name", module_names)
-@pytest.mark.filterwarnings("ignore::DeprecationWarning")
+@pytest.mark.parametrize('module_name', module_names)
+@pytest.mark.filterwarnings('ignore::DeprecationWarning')
 def test_getattr(module_name):
     """
     Test that __getattr__ methods raise AttributeError for unknown keys.
@@ -27,8 +27,8 @@ def test_getattr(module_name):
         module = import_module(module_name)
     except (ImportError, RuntimeError) as e:
         # Skip modules that cannot be imported due to missing dependencies
-        pytest.skip(f"Cannot import {module_name} due to {e}")
+        pytest.skip(f'Cannot import {module_name} due to {e}')
 
-    key = "THIS_SYMBOL_SHOULD_NOT_EXIST"
+    key = 'THIS_SYMBOL_SHOULD_NOT_EXIST'
     if hasattr(module, key):
         delattr(module, key)