Email image parts: regex for single closing quote

The regex for image src matches for single and double opening quotes: `([\'"])` The corresponding matching for non-closing characters is implemented for double quotes only: ([^"]+) This change adds a non-greedy regex `.+?` which matches for as few characters as possbile before the "correspondingly matched opening quote" `\\1` appears.
symfony · fabpot · Aug 19, 2022 · Aug 18, 2022 · Aug 18, 2022 · 57c49b4e1305c17c4f0d1d50b31784836c22bf87
commit 57c49b4e1305c17c4f0d1d50b31784836c22bf87
diff --git a/src/Symfony/Component/Mime/Email.php b/src/Symfony/Component/Mime/Email.php
@@ -503,7 +503,7 @@ private function prepareParts(): ?array
                $html = stream_get_contents($html);
            }
            $htmlPart = new TextPart($html, $this->htmlCharset, 'html');
-            preg_match_all('(<img\s+[^>]*src\s*=\s*(?:([\'"])cid:([^"]+)\\1|cid:([^>\s]+)))i', $html, $names);
+            preg_match_all('(<img\s+[^>]*src\s*=\s*(?:([\'"])cid:(.+?)\\1|cid:([^>\s]+)))i', $html, $names);
            $names = array_filter(array_unique(array_merge($names[2], $names[3])));
        }