Update comments for net/data/verify_certificate_chain_unittest/

net/data/verify_certificate_chain_unittest/root-basic-constraints-ca-false/generate-chains.py

Index: net/data/verify_certificate_chain_unittest/root-basic-constraints-ca-false/generate-chains.py
diff --git a/net/data/verify_certificate_chain_unittest/root-basic-constraints-ca-false/generate-chains.py b/net/data/verify_certificate_chain_unittest/root-basic-constraints-ca-false/generate-chains.py
index 4919d354567d909b03fca1f2cfa35f654e27de26..23a313caf524b2847dd22471b97f12280c37766a 100755
--- a/net/data/verify_certificate_chain_unittest/root-basic-constraints-ca-false/generate-chains.py
+++ b/net/data/verify_certificate_chain_unittest/root-basic-constraints-ca-false/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 a basic constraints extension that indicates it is NOT a CA. Verification
-is expected to succeed even though the trust anchor enforces constraints, since
-the CA part of basic constraints is not enforced."""
+"""Certificate chain where the root certificate contains a basic constraints
+extension that indicates it is NOT a CA."""
 
 import sys
 sys.path += ['..']
 
 import common
 
-# Self-signed root certificate (used as trust anchor) with non-CA basic
-# constraints.
+# Self-signed root certificate with non-CA basic constraints.
 root = common.create_self_signed_root_certificate('Root')
 root.get_extensions().set_property('basicConstraints', 'critical,CA:false')