Steps to reproduce:

1. Create template with item in 5.0 version
2. Add JavaScript preprocessing with value

   // Convert Apache status to JSON
   var lines = value.split('\n');
   var output = {},
       workers = {
           me:be
       };
   

3. Export template
   zbx_export_templates_js.xml
4. Import file in 5.4
5. Import file again in 5.4
6. Check javascript diff

Result:
each line of javascript are in quotes

Expected:
no quotes