Remove the behaviour of exclude recording empty lines

gui.py

@@ -505,7 +505,8 @@ def excludesave(self, text, toplevelwin):
         text = text.get('1.0', tk.END).splitlines()
         exclude = []
         for line in text:
-            exclude.append(line)
+            if line != "":
+                exclude.append(line)
         self.fileManager.exclude = exclude
         try:
             toplevelwin.destroy()