message: build: trim newline after bundle header git rev
diff: @@ -30,7 +30,9 @@ function update (ids) {
  bundle.version = release
  ? process.env.npm_package_version
  - : require('child_process').execSync('echo "@$(git rev-parse --short HEAD)$(git diff-index --quiet HEAD || echo -dirty)"');
  + : (require('child_process')
  + .execSync('echo "@$(git rev-parse --short HEAD)$(git diff-index --quiet HEAD || echo -dirty)"')
  + .toString().trim());
  bundle.write(b.bundle());
  }
  