Fix indentation error in app.py

app.py

@@ -1,16 +1,15 @@
 
-    import gradio as gr
-    from transformers import AutoModelForCausalLM, AutoTokenizer
+import gradio as gr
+from transformers import AutoModelForCausalLM, AutoTokenizer
 
-    model_name = "gpt2"
-    tokenizer = AutoTokenizer.from_pretrained(model_name)
-    model = AutoModelForCausalLM.from_pretrained(model_name)
+model_name = "gpt2"
+tokenizer = AutoTokenizer.from_pretrained(model_name)
+model = AutoModelForCausalLM.from_pretrained(model_name)
 
-    def generate_text(prompt):
-        inputs = tokenizer(prompt, return_tensors="pt")
-        outputs = model.generate(inputs.input_ids, max_length=50)
-        return tokenizer.decode(outputs[0], skip_special_tokens=True)
+def generate_text(prompt):
+    inputs = tokenizer(prompt, return_tensors="pt")
+    outputs = model.generate(inputs.input_ids, max_length=50)
+    return tokenizer.decode(outputs[0], skip_special_tokens=True)
 
-    demo = gr.Interface(fn=generate_text, inputs="text", outputs="text")
-    demo.launch()
-    
+demo = gr.Interface(fn=generate_text, inputs="text", outputs="text")
+demo.launch()