def goto_column(column_num):
    """To go to a certain column.

    This function uses the ``l`` command to move the cursor to
    a certain column on the **current line**.

    Usage:

    `In a config file:`

    .. code-block:: yaml

      - goto_column: 5

    `Using the API:`

    .. code-block:: python

      ezvi.tools.goto_column(5)

    :type column_num: int
    :param column_num: The number of the column to move the cursor to.

    :rtype: str
    :return: ``0`` plus a column position appended with ``l``.
    """

    # This would be much cleaner if I could get the cursor's position.
    to_write = "0" + str(column_num - 1) + "l"

    return to_write