It's needed for this quine to work. Upstream has it. See discussion in https://github.com/alangpierce/golang-quine/pull/1#issuecomment-226917669.
5eb48b5f5d31d39777719edb35d37b724f183dc8
Quines are fun Change-Id: I3dffaf514ac2a04046fb54b6179cd1677053c5c7 Reviewed-On: https://dmitri.shuralyov.com/scratch/...$changes/2
ed302c9ae10219a542d1a6d2d1293e1b7742b65a
