Fix bad indentation level in src/pip/_internal/cli/parser.py

The regression was introduced in 9f082bc and was leading to
configuration entries being yielded multiple times, turning them
to list instead of simple values and thus their validations were
failing.

Fixes #13548.

Author: anlambert

news/13548.bugfix.rst

@@ -0,0 +1,2 @@
+Fix regression in configuration parsing that was turning a single value
+into a list and thus leading to a validation error.

src/pip/_internal/cli/parser.py

@@ -203,9 +203,9 @@ def _get_ordered_configuration_items(
                 if section in override_order:
                     section_items[section].append((key, val))
 
-            # Yield each group in their override order
-            for section in override_order:
-                yield from section_items[section]
+        # Yield each group in their override order
+        for section in override_order:
+            yield from section_items[section]
 
     def _update_defaults(self, defaults: dict[str, Any]) -> dict[str, Any]:
         """Updates the given defaults with values from the config files and

tests/functional/test_configuration.py

@@ -9,12 +9,14 @@
 import sys
 import textwrap
 
+import pytest
+
 from pip._internal.cli.status_codes import ERROR
 from pip._internal.configuration import CONFIG_BASENAME, Kind
 from pip._internal.configuration import get_configuration_files as _get_config_files
 from pip._internal.utils.compat import WINDOWS
 
-from tests.lib import PipTestEnvironment
+from tests.lib import PipTestEnvironment, TestData
 from tests.lib.configuration_helpers import ConfigurationMixin, kinds
 from tests.lib.venv import VirtualEnvironment
 
@@ -212,3 +214,21 @@ def test_config_separated(
             ),
             result.stdout,
         )
+
+    @pytest.mark.network
+    def test_editable_mode_default_config(
+        self, script: PipTestEnvironment, data: TestData
+    ) -> None:
+        """Test that setting default editable mode through configuration works
+        as expected.
+        """
+        script.pip(
+            "config", "--site", "set", "install.config-settings", "editable_mode=strict"
+        )
+        to_install = data.src.joinpath("simplewheel-1.0")
+        script.pip("install", "-e", to_install)
+        assert os.path.isdir(
+            os.path.join(
+                to_install, "build", "__editable__.simplewheel-1.0-py3-none-any"
+            )
+        )