HTML entity pattern

Property definitions

markdown2 $ HtmlRenderer :: re_entity
	# HTML entity pattern
	private var re_entity: Regex = "^&(#x[a-f0-9]\{1,8\}|#[0-9]\{1,8\}|[a-z][a-z0-9]\{1,31\});".to_re
lib/markdown2/markdown_html_rendering.nit:105,2--106,98