Allow declarations with no space, as per spec

See commonmark/cmark@b1d961c

Author: colinodell

CHANGELOG.md

@@ -6,6 +6,10 @@ Updates should follow the [Keep a CHANGELOG](https://keepachangelog.com/) princi
 
 ## [Unreleased][unreleased]
 
+### Fixed
+
+- Fixed declaration parser being too strict
+
 ## [2.4.1] - 2023-08-30
 
 ### Fixed

composer.json

@@ -31,7 +31,7 @@
     "require-dev": {
         "ext-json": "*",
         "cebe/markdown": "^1.0",
-        "commonmark/cmark": "0.30.0",
+        "commonmark/cmark": "0.30.3",
         "commonmark/commonmark.js": "0.30.0",
         "composer/package-versions-deprecated": "^1.8",
         "embed/embed": "^4.4",
@@ -67,9 +67,9 @@
             "type": "package",
             "package": {
                 "name": "commonmark/cmark",
-                "version": "0.30.0",
+                "version": "0.30.3",
                 "dist": {
-                    "url": "https://github.com/commonmark/cmark/archive/0.30.0.zip",
+                    "url": "https://github.com/commonmark/cmark/archive/0.30.3.zip",
                     "type": "zip"
                 }
             }

src/Util/RegexHelper.php

@@ -55,7 +55,7 @@ final class RegexHelper
     public const PARTIAL_CLOSEBLOCKTAG         = '<\/' . self::PARTIAL_BLOCKTAGNAME . '\s*[>]';
     public const PARTIAL_HTMLCOMMENT           = '<!---->|<!--(?:-?[^>-])(?:-?[^-])*-->';
     public const PARTIAL_PROCESSINGINSTRUCTION = '[<][?][\s\S]*?[?][>]';
-    public const PARTIAL_DECLARATION           = '<![A-Z]+' . '\s+[^>]*>';
+    public const PARTIAL_DECLARATION           = '<![A-Z]+' . '[^>]*>';
     public const PARTIAL_CDATA                 = '<!\[CDATA\[[\s\S]*?]\]>';
     public const PARTIAL_HTMLTAG               = '(?:' . self::PARTIAL_OPENTAG . '|' . self::PARTIAL_CLOSETAG . '|' . self::PARTIAL_HTMLCOMMENT . '|' .
         self::PARTIAL_PROCESSINGINSTRUCTION . '|' . self::PARTIAL_DECLARATION . '|' . self::PARTIAL_CDATA . ')';