# whitespaces must not effect parsing
1, 2, 3
# no whitespaces in between digits
1,2,3
# leading whitespace
 1, 2, 3
# leading tab
	1, 2, 3
# tabs in between
	1,	2,	3
# tab in end
1,2,3	
#3 whitespaces in a row
   1,   2,   3
# tailing whitespace
1,2,3 
 # whitespaces before comment
	# tab before comment
# mix whitespaces and tabs all over
		 1  	, 	2  	,	3