[parsing] support comment end tag '--!>' as suggested by github-advanced-security bot

test/test_parsing.py

@@ -343,7 +343,7 @@ class TestParsing(unittest.TestCase):
         -----------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^-----------
         this is a leftover comment -->     <!-- a new comment without closing
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-        here   is   <!-- a comment -->   and   <!-- another comment -->   end
+        here   is   <!-- a comment -->   and   <!-- another comment --!>  end
         ----------------^^^^^^^^^^^----------------^^^^^^^^^^^^^^^^^---------
         <script> ignore here </script>            <SCRIPT> and here </SCRIPT>
         --------^^^^^^^^^^^^^-----------------------------^^^^^^^^^^---------

yt_dlp/parsing.py

@@ -20,7 +20,7 @@ class HTMLIgnoreRanges:
             if offset in ranges:
                 ...
     """
-    REGEX = re.compile(r'<!--|-->|</?\s*(?:script|style)\b[^>]*>', flags=re.IGNORECASE)
+    REGEX = re.compile(r'<!--|--!?>|</?\s*(?:script|style)\b[^>]*>', flags=re.IGNORECASE)
 
     def __init__(self, html):
         self.html = html
@@ -40,7 +40,7 @@ class HTMLIgnoreRanges:
         if self._last_match is None:
             return False
         match_string = self._last_match.group()
-        if match_string.startswith('</') or match_string == '-->':
+        if match_string.startswith('</') or match_string in ('-->', '--!>'):
             return offset < self._last_match.start()
         return offset >= self._last_match.end()