Fix DelightfulTTS (#2823)

* Fix tests

* Make style

tests/tts_tests2/test_delightful_tts_d-vectors_train.py

@@ -39,7 +39,9 @@ config = DelightfulTTSConfig(
     print_eval=True,
     binary_align_loss_alpha=0.0,
     use_attn_priors=False,
-    test_sentences=["Be a voice, not an echo."],
+    test_sentences=[
+        ["Be a voice, not an echo.", "ljspeech-0"],
+    ],
     output_path=output_path,
     use_speaker_embedding=False,
     use_d_vector_file=True,

tests/tts_tests2/test_delightful_tts_emb_spk.py

@@ -37,7 +37,9 @@ config = DelightfulTTSConfig(
     print_eval=True,
     binary_align_loss_alpha=0.0,
     use_attn_priors=False,
-    test_sentences=["Be a voice, not an echo."],
+    test_sentences=[
+        ["Be a voice, not an echo.", "ljspeech"],
+    ],
     output_path=output_path,
     num_speakers=4,
     use_speaker_embedding=True,

tests/tts_tests2/test_delightful_tts_train.py

@@ -51,7 +51,7 @@ config = DelightfulTTSConfig(
     use_attn_priors=False,
     print_eval=True,
     test_sentences=[
-        "Be a voice, not an echo.",
+        ["Be a voice, not an echo."],
     ],
     use_speaker_embedding=False,
 )