show alert with listbox items with line break

i want show alert with listbox items with line break
this is code i want simple modify to it

var dialog = new Window("dialog");
dialog.text = "Resize Layer with input Value - MohamedHameed-01033032007"; 
dialog.minimumSize.width = 375;  dialog.minimumSize.height = 200; 

var HWT=dialog.add("edittext", [0,0,89,25], "", { wantReturn:true});

var listBox = dialog.add("listbox", undefined ,
            {   
            numberOfColumns: 1,   
            showHeaders: true,   
            //multiselect:true,
            columnTitles: ["" + 'Name'] ,
            columnWidths: [250],
            columnheights:[50,50],
            showHeaders:true
            //columnTitles:['Filename']
           
        });
    
     listBox.size = [400, 150]
     Add = dialog.add("button", [0,0,400,35], "Add");
     Finish = dialog.add("button", [0,0,400,35], "Cancel/Reset");

Add.onClick = function() {
                     listBox.add("item", HWT.text);   
          }
      Finish.onClick = function() {
          for(var i = 0; i < listBox.items.length; i++) {
var listOne = listBox.items;
      }
  alert (listOne.join("\n"))
      }
     
     dialog.show()