@Override
    public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
        if (bodyLevel > 0 && discardLevel == 0) {
            super.ignorableWhitespace(ch, start, length);
        }
    }
Adds a metadata setting from the HTML <head/> to the Tika metadata
object. The name and value are normalized where possible.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-html-module/src/main/java/org/apache/tika/parser/html/HtmlHandler.java