def comment(path,
            regex,
            char='#',
            backup='.bak'):
    '''
    .. deprecated:: 0.17.0
       Use :py:func:`~salt.modules.file.replace` instead.

    Comment out specified lines in a file

    path
        The full path to the file to be edited
    regex
        A regular expression used to find the lines that are to be commented;
        this pattern will be wrapped in parenthesis and will move any
        preceding/trailing ``^`` or ``$`` characters outside the parenthesis
        (e.g., the pattern ``^foo$`` will be rewritten as ``^(foo)$``)
    char : ``#``
        The character to be inserted at the beginning of a line in order to
        comment it out
    backup : ``.bak``
        The file will be backed up before edit with this file extension

        .. warning::

            This backup will be overwritten each time ``sed`` / ``comment`` /
            ``uncomment`` is called. Meaning the backup will only be useful
            after the first invocation.

    CLI Example:

    .. code-block:: bash

        salt '*' file.comment /etc/modules pcspkr
    '''
    return comment_line(path=path,
                        regex=regex,
                        char=char,
                        cmnt=True,
                        backup=backup)
.. deprecated:: 0.17.0
       Use :py:func:`~salt.modules.file.replace` instead.

    Comment out specified lines in a file

    path
        The full path to the file to be edited
    regex
        A regular expression used to find the lines that are to be commented;
        this pattern will be wrapped in parenthesis and will move any
        preceding/trailing ``^`` or ``$`` characters outside the parenthesis
        (e.g., the pattern ``^foo$`` will be rewritten as ``^(foo)$``)
    char : ``#``
        The character to be inserted at the beginning of a line in order to
        comment it out
    backup : ``.bak``
        The file will be backed up before edit with this file extension

        .. warning::

            This backup will be overwritten each time ``sed`` / ``comment`` /
            ``uncomment`` is called. Meaning the backup will only be useful
            after the first invocation.

    CLI Example:

    .. code-block:: bash

        salt '*' file.comment /etc/modules pcspkr