for windows

mediasum.py

@@ -104,9 +104,9 @@ class MediaSumSummarizationDataset(datasets.GeneratorBasedBuilder):
 
     def _split_generators(self, dl_manager):
 
-        train_path = dl_manager.download_and_extract(self._TRAIN_FILE) + "/train_data.txt"
-        val_path = dl_manager.download_and_extract(self._VAL_FILE) + "/val_data.txt"
-        test_path = dl_manager.download_and_extract(self._TEST_FILE) + "/test_data.txt"
+        train_path = os.path.join(dl_manager.download_and_extract(self._TRAIN_FILE), "train_data.txt")
+        val_path = os.path.join(dl_manager.download_and_extract(self._VAL_FILE), "val_data.txt")
+        test_path = os.path.join(dl_manager.download_and_extract(self._TEST_FILE), "test_data.txt")
         
         return [
             datasets.SplitGenerator(