{{alias}}( str, search )
    Returns the part of a string before the last occurrence of a specified
    substring.

    Parameters
    ----------
    str: string
        Input string.

    search: string
        Search value.

    Returns
    -------
    out: string
        Substring.

    Examples
    --------
    > var str = 'Beep Boop Beep';
    > var out = {{alias}}( str, 'Beep' )
    'Beep Boop '
    > out = {{alias}}( str, 'Boop' )
    'Beep '

    See Also
    --------