case insensitive for HTML attributes #1096
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The HTML parser treated attribute names in a case-sensitive manner, which is not compliant with the HTML specifications.
This behavior caused incorrect escaping of tags containing attributes with uppercase letters, such as the
viewBoxattribute in SVG tags.This change updates the
PARTIAL_ATTRIBUTENAMEregular expression to accept both uppercase and lowercase letters, ensuring that HTML attributes are correctly recognized regardless of their case.