message: lib/prefixClass: remove extra space
diff: @@ -16,13 +16,16 @@ function prefixSingle(scopedStyle: string): string {
  }
  export function prefixClass(scopedStyle?: string | string[]) {
  - let resolved = '';
  if (typeof scopedStyle === 'string') {
  - resolved = prefixSingle(scopedStyle);
  - } else {
  - for (let i = 0; i < scopedStyle.length; i++) {
  - resolved += ' ' + prefixSingle(scopedStyle[i]);
  + return prefixSingle(scopedStyle);
  }
  +
  + let resolved = '';
  + for (let i = 0; i < scopedStyle.length; i++) {
  + const separator = resolved ? ' ' : '';
  +
  + resolved += separator + prefixSingle(scopedStyle[i]);
  }
  +
  return resolved;
  }
  