[spec] Gray-out uninteresting backtrace lines instead of completely removing.
[spec] Gray-out uninteresting backtrace lines instead of completely removing.

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