报错示例：拉镜像时提示 credential helper 不存在。
17. 理论动态| 坚持稳中求进、提质增效努力实现“十五五”良好开局————理论学习, www.ccdi.gov.cn/llxx/202602…
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* Code should be very well commented: things must be explained in terms that even people not well versed with certain Z80 or Spectrum internals details should understand.