HTML entity pattern

Property definitions

markdown2 $ MdInlineParser :: re_entity_here
	# HTML entity pattern
	private var re_entity_here: Regex do
		var re = "^&(#x[a-f0-9]\{1,8\}|#[0-9]\{1,8\}|[a-z][a-z0-9]\{1,31\});".to_re
		re.ignore_case = true
		return re
	end
lib/markdown2/markdown_inline_parsing.nit:822,2--827,4