Revise consecutive empty space to single space.

    Example::

        " I   feel    so  GOOD!" => "This is so GOOD!"

    **中文文档**

    确保文本中不会出现多余连续1次的空格。

def format_single_space_only(text):
    """Revise consecutive empty space to single space.

    Example::

        " I   feel    so  GOOD!" => "This is so GOOD!"

    **中文文档**

    确保文本中不会出现多余连续1次的空格。
    """
    return " ".join([word for word in text.strip().split(" ") if len(word) >= 1])