Index: Lib/ConfigParser.py
===================================================================
--- Lib/ConfigParser.py	(revision 84443)
+++ Lib/ConfigParser.py	(working copy)
@@ -432,7 +432,7 @@
     #
     SECTCRE = re.compile(
         r'\['                                 # [
-        r'(?P<header>[^]]+)'                  # very permissive!
+        r'\s*(?P<header>[^]]+)\s*'            # very permissive!
         r'\]'                                 # ]
         )
     OPTCRE = re.compile(