dwdoc/node_modules/prismjs/components/prism-markup.js

Prism.languages.markup = {
	'comment': /<!--[\w\W]*?-->/,
	'prolog': /<\?.+?\?>/,
	'doctype': /<!DOCTYPE.+?>/,
	'cdata': /<!\[CDATA\[[\w\W]*?]]>/i,
	'tag': {
		pattern: /<\/?[\w:-]+\s*(?:\s+[\w:-]+(?:=(?:("|')(\\?[\w\W])*?\1|[^\s'">=]+))?\s*)*\/?>/i,
		inside: {
			'tag': {
				pattern: /^<\/?[\w:-]+/i,
				inside: {
					'punctuation': /^<\/?/,
					'namespace': /^[\w-]+?:/
				}
			},
			'attr-value': {
				pattern: /=(?:('|")[\w\W]*?(\1)|[^\s>]+)/i,
				inside: {
					'punctuation': /=|>|"/
				}
			},
			'punctuation': /\/?>/,
			'attr-name': {
				pattern: /[\w:-]+/,
				inside: {
					'namespace': /^[\w-]+?:/
				}
			}

		}
	},
	'entity': /&#?[\da-z]{1,8};/i
};

// Plugin to make entity title show the real entity, idea by Roman Komarov
Prism.hooks.add('wrap', function(env) {

	if (env.type === 'entity') {
		env.attributes['title'] = env.content.replace(/&amp;/, '&');
	}
});