Hello,

What version of Go are you using (go version)?

go version go1.8.3 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What did you do?

package main

func main() {
	grpc_prometheus.EnableHandlingTimeHistogram()
}

What did you expect to see?

package main

import "github.com/grpc-ecosystem/go-grpc-prometheus"

func main() {
	grpc_prometheus.EnableHandlingTimeHistogram()
}

What did you see instead?

It did not import the package.

After digging a bit, I found that it is coming from here and here.

goimports currently compares the last two components while removing the hyphens but should it handle underscores too ?