.. 请确保至少包含基本的 `toctree` 指令

.. _shell_contents:

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Google: Shell 风格指南
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.. contents::
    :backlinks: none

.. toctree::
    :maxdepth: 3

    index
    background
    shell_files_and_interpreter_invocation
    environment
    comments
    formatting
    features_and_bugs
    naming_conventions
    calling_commands
    conclusion