Merge pull request #71 from FGYFFFF/fix/remove_debug_info

fix: remove debug info

Author: andeya

expr.go

@@ -195,11 +195,7 @@ func subSortPriority(e ExprNode, isLeft bool) bool {
 	leftChanged := subSortPriority(e.LeftOperand(), true)
 	rightChanged := subSortPriority(e.RightOperand(), false)
 	if getPriority(e) > getPriority(e.LeftOperand()) {
-		printf("before:\n")
-		printExprNode(e)
 		leftOperandToParent(e, isLeft)
-		printf("after:\n")
-		printExprNode(e.Parent())
 		return true
 	}
 	return leftChanged || rightChanged