Symfony version(s) affected

3, 4, 5, 6, 7

Description

There's an issue with encoding an address header, if the name part is utf-8 and contains double spaces.

Basic example
From: Fabïen Pötencier <fabï[email protected]> encodes to:
From: =?utf-8?Q?Fab=C3=AFen?= =?utf-8?Q?P=C3=B6tencier?= <fabï[email protected]>

The problem is the doubles spaces between the two utf-8 parts, by RFC2047 6.2 those linear-white-space characters should be ignored.

More about the issue: zbateson/mail-mime-parser#244

How to reproduce

Created a basic example repository:
https://github.com/0xb4lint/mime-address-issue/blob/main/index.php

$mail = (new Symfony\Component\Mime\Email())
    ->from(new Symfony\Component\Mime\Address(
        '[email protected]',
        'fóó  bár'
    ))
    ->html('test');

And added some mail client screenshots, showing the double spaces are ignored:
https://github.com/0xb4lint/mime-address-issue/tree/main/client-screenshots

Generated mime message:

From: =?utf-8?Q?f=C3=B3=C3=B3?=  =?utf-8?Q?b=C3=A1r?= <[email protected]>
MIME-Version: 1.0
Date: Thu, 17 Oct 2024 09:08:34 +0000
Message-ID: <[email protected]>
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: quoted-printable

test

Failing tests can be found here:
0xb4lint@1478b7c

Possible Solution

I think the issue is originated from the AbstractHeader::createPhrase() function, which encodes the string word-by-word and ignored the double spaces: https://github.com/symfony/symfony/blob/7.2/src/Symfony/Component/Mime/Header/AbstractHeader.php#L88

Additional Context

No response