Fix remaining lint problems in dot.js
Fix remaining lint problems in dot.js

Tails/vexflow,aaronmars/vexflow,Huji/vexflow,Silverwolf90/vexflow,aaronmars/vexflow,aaronmars/vexflow,Huji/vexflow,Silverwolf90/vexflow,Tails/vexflow,Silverwolf90/vexflow,Tails/vexflow,Huji/vexflow