[ethereum/go-ethereum] contracts/*: golint updates for this or self warning (#16619)

Thank you for your contribution! Your commits seem to not adhere to the repository coding standards

* Commit: 64ed58a3a7ccd6a37ddd25c0d857a095a7772238
* Commits must be prefixed with the package(s) they modify

* Commit: 1bcc642259ecce0e4660d404f29bdc48f057308a
* Commits must be prefixed with the package(s) they modify

* Commit: 25f893be4449495ae0e8cb61ea58cf122e9a7c5b
* Commits must be prefixed with the package(s) they modify

Please check the [contribution guidelines](https://github.com/ethereum/go-ethereum#contribution) for more details.

This post was last modified on May 7, 2018, 9:10 pm