Data tag parsing failed: Unable to locate name/value separator for string:

So I was using the new Armor and Weapon tags instead of the old ones, I've check the posts and this is what I get from it's output.
Data tag parsing failed: Unable to locate name/value separator for string:
If matters, command is
/summon Skeleton ~ ~2 ~ {HandItems:[0:

{wooden_sword}

,1:{}],ArmorItems:[0:{},1:{},2:{},3:{}]}