List marker matching

Property definitions

markdown2 :: markdown_block_parsing $ Sys :: re_list_marker=
	# List marker matching
	var re_list_marker: Regex = "^([*+-])( |\t|$)|^([0-9]\{1,9\})([.)])( |\t|$)".to_re
lib/markdown2/markdown_block_parsing.nit:1414,2--1415,83