Fix indentation in core conf test (apache#47424)

Author: bugraoz93

tests/core/test_configuration.py

@@ -640,10 +640,11 @@ def test_auth_backends_adds_session(self):
                 )
 
     def test_command_from_env(self):
-        test_cmdenv_config = """[testcmdenv]
-itsacommand = NOT OK
-notacommand = OK
-"""
+        test_cmdenv_config = textwrap.dedent("""\
+            [testcmdenv]
+            itsacommand=NOT OK
+            notacommand=OK
+        """)
         test_cmdenv_conf = AirflowConfigParser()
         test_cmdenv_conf.read_string(test_cmdenv_config)
         test_cmdenv_conf.sensitive_config_values.add(("testcmdenv", "itsacommand"))