Update comments for net/data/verify_certificate_chain_unittest/

net/data/verify_certificate_chain_unittest/intermediate-unknown-critical-extension/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/intermediate-unknown-critical-extension/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/intermediate-unknown-critical-extension/generate-chains.py b/net/data/verify_certificate_chain_unittest/intermediate-unknown-critical-extension/generate-chains.py
index f7863dfdefe7960f533fec96d5df0ff3744e12ff..26cb4d401bd9275058d947c03201b9d09241be8f 100755
--- a/net/data/verify_certificate_chain_unittest/intermediate-unknown-critical-extension/generate-chains.py
+++ b/net/data/verify_certificate_chain_unittest/intermediate-unknown-critical-extension/generate-chains.py
@@ -3,17 +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 trusted root. The intermediate
-has an unknown X.509v3 extension (OID=1.2.3.4) that is marked as critical.
-Verifying this certificate chain is expected to fail because there is an
-unrecognized critical extension."""
+"""Certificate chain where the intermediate has an unknown critical
+extension."""
 
 import sys
 sys.path += ['..']
 
 import common
 
-# Self-signed root certificate (used as trust anchor).
+# Self-signed root certificate.
 root = common.create_self_signed_root_certificate('Root')
 
 # Intermediate that has an unknown critical extension.