```
go tool vet -all .
builtin/providers/aws/resource_aws_elasticache_security_group.go:130: arg apierr.Code in printf call is a function value, not a function call
builtin/providers/aws/resource_aws_elasticache_subnet_group.go:155: arg apierr.Code in printf call is a function value, not a function call
```
This landed in aws-sdk-go yesterday, breaking the AWS provider in many places:
3c259c9586
Here, with much sedding, grepping, and manual massaging, we attempt to
catch Terraform up to the new `awserr.Error` interface world.
Paul Hinze