placing line break flash messages ~or~ multi line flash messages in a python flask html template

Flashing Messages (in method).py

#      EDIT THIS CODE TO YOUR SPECIFIC NEEDS
#  THIS CODE REQUIRES SPECIFIC HTML CODE TO BE PLACED 
#     INSIDE THE TEMPLATE EXAMPLE FOUND BELOW


from flask import Flask, flash



def some_method():

    try:
        ("something that could trigger an exception")
    except ("the exception type"):
        optional = "some optional variable"
        message = f"first sentence \n\n" \
            f"second sentence \n\n" \
            f" third sentence an optional f string {optional}"
        text_msg = message.split('\n')
        flash(text_msg, category="warning")
        return redirect(url_for("home"))
    else:
        print("something else")
        return redirect(url_for("user")
                        

Flashing Messages (in template).html

<!-- PLACED THIS CODE INSIDE YOUR TEMPLATE FILE -->


{% block content %}

<div class="content">
    {% with messages = get_flashed_messages(with_categories=true)  %}
        {% if messages %}
            {% for category, message in messages %}
            <p class="{{ category }}">
                {% for line in message %}
                    {{line}}<br>
                    {% endfor %}
                </p>
            {% endfor %}
        {% endif %}
    {% endwith %}
    
    
</div>
{% endblock %}