Merge p3yk branch with the trunk up to revision 45595. This breaks a fair

number of tests, all because of the codecs/_multibytecodecs issue described
here (it's not a Py3K issue, just something Py3K discovers):
http://mail.python.org/pipermail/python-dev/2006-April/064051.html

Hye-Shik Chang promised to look for a fix, so no need to fix it here. The
tests that are expected to break are:

test_codecencodings_cn
test_codecencodings_hk
test_codecencodings_jp
test_codecencodings_kr
test_codecencodings_tw
test_codecs
test_multibytecodec

This merge fixes an actual test failure (test_weakref) in this branch,
though, so I believe merging is the right thing to do anyway.

Lib/test/test_optparse.py

@@ -1382,8 +1382,15 @@ options:
 
 class TestHelp(BaseTest):
     def setUp(self):
+        self.orig_columns = os.environ.get('COLUMNS')
         self.parser = self.make_parser(80)
 
+    def tearDown(self):
+        if self.orig_columns is None:
+            del os.environ['COLUMNS']
+        else:
+            os.environ['COLUMNS'] = self.orig_columns
+
     def make_parser(self, columns):
         options = [
             make_option("-a", type="string", dest='a',