<document source="test data">
    <system_message level="3" line="1" source="test data" type="ERROR">
        <paragraph>
            Error in "list-table" directive:
            invalid option value: (option: "widths"; value: '1.2 2.6')
            invalid literal for int(): 1.2.
        <literal_block xml:space="preserve">
            .. list-table::
               :widths: 1.2 2.6
            
               * - column 1
                 - column 2