def template_to_text(tmpl, debug=0):
    """
    convert parse tree template to text
    """
    tarr = []
    for item in tmpl.itertext():
        tarr.append(item)
    text = '{{%s}}' % '|'.join(tarr).strip()
    if debug > 1:
        print('+ template_to_text:')
        print('  %s' % text)
    return text
