Incorrect HTML magic identification when preceeded by a comment #102
Description
If the HTML has a comment before the opening tag, it is incorrectly identified as XML.
Steps to reproduce
io = StringIO.new(<<~HTML)
<!--/* Throwaway comment but it has to be over 64 characters to fail AND have a uppercase HTML tag */-->
<HTML>
<head>
</head>
<body>
<h1>Magic!</h1>
</body
</HTML>
HTML
Marcel::MimeType.for(io)
# => "application/xml"io = StringIO.new(<<~HTML)
<!--/* Throwaway comment but it has to be over 128 characters to fail AND have a lowercase HTML tag, we can pad this one out a bit to get it longer */-->
<html>
<head>
</head>
<body>
<h1>Magic!</h1>
</body
</html>
HTML
Marcel::MimeType.for(io)
# => "application/xml"Updating the magic definitions is a temporary workaround but obviously the comment could be any length, the broader lookup here https://github.com/rails/marcel/blob/main/lib/marcel/tables.rb#L2761 falls below the comment xml matching magic in https://github.com/rails/marcel/blob/main/lib/marcel/tables.rb#L2747.
Temporary workaround
Marcel::MimeType.extend "text/html", magic: [[0..256, "<HTML"]]
Marcel::MimeType.extend "text/html", magic: [[0..256, "<html"]]