Improve formatting with 'go fmt' as stated in CONTRIBUTING.md

As 'go fmt' doesn't support verifying files in multiple directories,
it's probably a good idea to run it on all '*.go' files from time to
time with something like this:

  find . -name "*.go" | xargs dirname | sort -u | xargs -n 1 echo go fmt

commands_test.go

@@ -152,7 +152,6 @@ func TestRunWorkdirExists(t *testing.T) {
 
 }
 
-
 func TestRunExit(t *testing.T) {
 	stdin, stdinPipe := io.Pipe()
 	stdout, stdoutPipe := io.Pipe()

sysinit.go

@@ -30,7 +30,6 @@ func setupWorkingDirectory(workdir string) {
 	syscall.Chdir(workdir)
 }
 
-
 // Takes care of dropping privileges to the desired user
 func changeUser(u string) {
 	if u == "" {