main: replace crlf on windows in fmt test

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

format_test.go

@@ -10,6 +10,7 @@ import (
 	"io/fs"
 	"os"
 	"path/filepath"
+	"runtime"
 	"sync"
 	"testing"
 )
@@ -32,6 +33,9 @@ func TestFormatting(t *testing.T) {
 				t.Errorf("unable to read %s: %v", path, err)
 				return
 			}
+			if runtime.GOOS == "windows" {
+				src = bytes.ReplaceAll(src, []byte{'\r', '\n'}, []byte{'\n'})
+			}
 			formatted, err := format.Source(src)
 			if err != nil {
 				t.Errorf("unable to format %s: %v", path, err)