yaml - 从命令提示符添加到 yaml 文件时出现 yq 错误

Question

我正在使用以下命令通过此链接添加 yaml 文件。

yq w sample.yaml b.c cat

我不断收到此错误。我该如何纠正这个

    Error: Error reading document at index 0, yaml: line 12: could not find expected ':': yaml: line 12: could not find expected ':'
Usage:
  yq write [yaml_file] [path_expression] [value] [flags]