Update app.py

Increase generated text length and avoid repetition in the generated output.

app.py

@@ -171,7 +171,7 @@ gpt2_tkn=GPT2Tokenizer.from_pretrained('gpt2')
 
 def generate(starting_text):
     tkn_ids = gpt2_tkn.encode(starting_text, return_tensors = 'pt')
-    gpt2_tensors = mdl.generate(tkn_ids)
+    gpt2_tensors = mdl.generate(tkn_ids, max_length=100, no_repeat_ngram_size=True)
     response=""
     #response = gpt2_tensors
     for i, x in enumerate(gpt2_tensors):