本文档翻译自：https://docs.conan.io/en/latest/reference/commands/misc/help.html

    1. $ conan help [-h] [command]

    显示特定命令的帮助。

    1. positional arguments:
    2.   command     command
    4. optional arguments:
    5.   -h, --help  show this help message and exit

    此命令等效于—help和-h参数

    Example:

    1. $ conan help get
    2. > usage: conan get [-h] [-p PACKAGE] [-r REMOTE] [-raw] reference [path]
    3. > Gets a file or list a directory of a given reference or package.
    5. # same as
    6. $ conan get -h