[Webhook] Replace \n in messages with a single space.
[Webhook] Replace \n in messages with a single space.

k0nserv/trunk.cocoapods.org,billinghamj/trunk.cocoapods.org,CocoaPods/trunk.cocoapods.org,Shawn-WangDapeng/trunk.cocoapods.org,CocoaPods/trunk.cocoapods.org,k0nserv/trunk.cocoapods.org,Shawn-WangDapeng/trunk.cocoapods.org,k0nserv/trunk.cocoapods.org,billinghamj/trunk.cocoapods.org