message: Fix json spacing on update
diff: @@ -208,7 +208,7 @@ export default class GitWriter implements Writer {
  let signature = await this._commitOptions('update', type, cardId, session);
  - file.setContent(stringify(document.jsonapi));
  + file.setContent(stringify(document.jsonapi, { space: 2 }));
  version = await change.finalize(signature);
  meta = Object.assign({}, document.jsonapi.data.meta);
  