Minor fixes.

notebooks/piper_multilingual_training_notebook.ipynb

@@ -272,13 +272,13 @@
         "resample = False #@param {type:\"boolean\"}\n",
         "if resample:\n",
         "  !python resample.py --input_dir \"/content/dataset/wavs\" --output_dir \"/content/dataset/wavs_resampled\" --output_sr {sample_rate} --file_ext \"wav\"\n",
-        "  !mv \"/content/dataset/wavs_resampled/*\" \"/content/dataset/wavs\"\n",
+        "  !mv /content/dataset/wavs_resampled/* /content/dataset/wavs\n",
         "#@markdown ---\n",
         "\n",
         "!python -m piper_train.preprocess \\\n",
         "  --language {final_language} \\\n",
         "  --input-dir /content/dataset \\\n",
-        "  --output-dir {output_dir} \\\n",
+        "  --output-dir \"{output_dir}\" \\\n",
         "  --dataset-format {dataset_format} \\\n",
         "  --sample-rate {sample_rate} \\\n",
         "  {force_sp}"