Remove empty spaces and comments

src/main/java/es/uv/saic/service/EnhancementService.java

@@ -62,7 +62,9 @@ public class EnhancementService {
         }
 
         return cleanDoc.body().html()
-                .replaceAll(">\\s+<", "><")   // remove spaces between tags
+                .replace("&nbsp;", "")
+                .replaceAll("<!--.*?-->", "")
+                .replaceAll(">\\s+<", "><") // remove spaces between tags
                 .trim();
     }
 }