Run go fmt

Summary:
One of Golang's "advantages" is not quibbling over style. To this end
the go fmt command exists. This is the result of me running:

find . -name '*.go' -exec go fmt {} \;

Test Plan: built package, ran tests

Reviewers: dduvall, mmodell, Release-Engineering-Team

Reviewed By: dduvall, mmodell, Release-Engineering-Team

Subscribers: hashar

Tags: Release-Engineering-Team

Differential Revision: https://phabricator.wikimedia.org/D694