整理代码习惯，常量字符串改用单引号，可能有遗漏

Zframework/aDraw.lua

@@ -1,7 +1,7 @@
 local printf=love.graphics.printf
 local draw=love.graphics.draw
 local aDraw={}
-function aDraw.str(obj,x,y)printf(obj,x-626,y,1252,"center")end
+function aDraw.str(obj,x,y)printf(obj,x-626,y,1252,'center')end
 function aDraw.simpX(obj,x,y)draw(obj,x-obj:getWidth()*.5,y)end
 function aDraw.simpY(obj,x,y)draw(obj,x,y-obj:getHeight()*.5)end
 function aDraw.X(obj,x,y,a,k)draw(obj,x,y,a,k,nil,obj:getWidth()*.5,0)end