import re


def remove_leading_space(string: str) -> str:
    """
    Remove the leading space of a string at every line.

    :param string: String to be processed
    :type string: str
    :return: Result string
    :rtype: str

    **Example:**

    .. code-block:: python

        string = " Hello \\nWorld!"
        result = remove_trailing_space(string) # "Hello \\nWorld!"
    """
    return re.sub(r"^[ \t]*", "", string, flags=re.MULTILINE)