Adjust test, style, and NEWS wrapping

Author: abdoulrasheed

Lib/configparser.py

@@ -471,10 +471,8 @@ def _interpolate_some(self, parser, option, accum, rest, section, map,
                 except KeyError:
                     raise InterpolationMissingOptionError(
                         option, section, rawval, var) from None
-
                 if v is None:
                     continue
-
                 if "%" in v:
                     self._interpolate_some(parser, option, accum, v,
                                            section, map, depth + 1)

Lib/test/test_configparser.py

@@ -1385,10 +1385,10 @@ def test_interpolation_with_allow_no_value(self):
         cf.read_string(textwrap.dedent("""
             [s]
             a
-            b = x%(a)sy
+            b = %(a)s
         """))
         self.assertIsNone(cf["s"]["a"])
-        self.assertEqual(cf.get("s", "b"), "xy")
+        self.assertEqual(cf.get("s", "b"), "")
 
 
 class ConfigParserTestCaseTrickyFile(CfgParserTestCaseClass, unittest.TestCase):

Misc/NEWS.d/next/Library/2026-07-17-18-53-45.gh-issue-153855.h6YZOX.rst

@@ -1 +1,4 @@
-Fix :class:`configparser.BasicInterpolation` raising ``TypeError`` when interpolating a reference to a value-less option with ``allow_no_value=True``; it now treats the missing value as empty, like :class:`configparser.ExtendedInterpolation`.
+Fix :class:`configparser.BasicInterpolation` raising ``TypeError`` when
+interpolating a reference to a value-less option with
+``allow_no_value=True``; it now treats the missing value as empty, like
+:class:`configparser.ExtendedInterpolation`.