def add_non_tree_strings(strings, strings_to_add, add_separator=True):
    """
    Adding training stage strings
    to the experiment description

    Parameters
    ----------
    strings : list of strings
        description of the experiment
    strings_to_add : dict of lists of strings
        new information to add to the experiment
    add_separator : bool
        make pretty separation line
        at the end of this strings (Default value = True)

    Returns
    -------
    strings : list of strings
        description of the experiment
    """
    separation_string = ''
    for id_string in range(len(strings_to_add[0])):
        string = " "
        for id_stage, value in strings_to_add.items():
            string += value[id_string] + " | "
            if len(separation_string) < len(string):
                separation_string += "─" * (len(value[id_string]) + 2) + '+'
        string = string[:-3]
        strings.append(string)
    if add_separator:
        strings.append(separation_string[:-3])
    return strings