Update comments for net/data/verify_certificate_chain_unittest/

net/data/verify_certificate_chain_unittest/root-eku-clientauth/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/root-eku-clientauth/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/root-eku-clientauth/generate-chains.py b/net/data/verify_certificate_chain_unittest/root-eku-clientauth/generate-chains.py
index e58cd0adf85794cf64afe9beb6abd185d4958bcb..e7490fb931b66e9e57034f7592e8300e7a3afcb0 100755
--- a/net/data/verify_certificate_chain_unittest/root-eku-clientauth/generate-chains.py
+++ b/net/data/verify_certificate_chain_unittest/root-eku-clientauth/generate-chains.py
@@ -3,18 +3,15 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""Certificate chain with 1 intermediate and a trust anchor. The trust anchor
-has an EKU that restricts it to clientAuth. Verification is expected to fail as
-the end-entity is verified for serverAuth, and the trust anchor enforces
-constraints."""
+"""Certificate chain where the root certificate restricts the extended key
+usage to clientAuth."""
 
 import sys
 sys.path += ['..']
 
 import common
 
-# Self-signed root certificate (used as trust anchor) with non-CA basic
-# constraints.
+# Self-signed root certificate with extended key usage of clientAuth.
 root = common.create_self_signed_root_certificate('Root')
 root.get_extensions().set_property('extendedKeyUsage', 'clientAuth')