如何在Flask应用中将字符串中的'\n‘替换为'<br>’？

from flask import Flask, render_template_string

app = Flask(__name__)

@app.route('/')
def replace_newline():
    original_string = "This is a\nmultiline\nstring."
    modified_string = original_string.replace('\n', '<br>')
    return render_template_string(modified_string)

if __name__ == '__main__':
    app.run()