Actually apply the pre-commit fixers to the codebase.

This can be redone manually with
`pre-commit run --all`

While the pre-commit hook could be merged to run locally,
it is much cleaner to align all the files to best-practice
syntax in a single commit. It is also required for server-side
validation.

util/gzip_handler_test.go

@@ -2,11 +2,12 @@ package util
 
 import (
 	"compress/gzip"
-	"github.com/stretchr/testify/require"
 	"io"
 	"net/http"
 	"net/http/httptest"
 	"testing"
+
+	"github.com/stretchr/testify/require"
 )
 
 func TestGzipHandler(t *testing.T) {