Add modification warning to templated files
diff --git a/templates/gRPC-Core.podspec.template b/templates/gRPC-Core.podspec.template
index baa9f54..18dabb9 100644
--- a/templates/gRPC-Core.podspec.template
+++ b/templates/gRPC-Core.podspec.template
@@ -1,10 +1,12 @@
%YAML 1.2
--- |
- # GRPC CocoaPods podspec
- # This file has been automatically generated from a template file. Please make modifications to
- # `templates/gRPC-Core.podspec.template` instead. This file can be regenerated from the template by
- # running `tools/buildgen/generate_projects.sh`.
+ # This file has been automatically generated from a template file.
+ # Please make modifications to `templates/gRPC-Core.podspec.template`
+ # instead. This file can be regenerated from the template by running
+ # `tools/buildgen/generate_projects.sh`.
+ # gRPC Core CocoaPods podspec
+ #
# Copyright 2015, Google Inc.
# All rights reserved.
#