better formatting for third example

Author: dsfaccini

docs/gateway.md

@@ -138,8 +138,6 @@ You can access multiple models with the same API key, as shown in the code snipp
     Pass your API key directly using the provider:
 
     ```python {title="passing_api_key.py"}
-    from pydantic_ai import Agent
-
     from pydantic_ai import Agent
     from pydantic_ai.providers.gateway import gateway_provider
     from pydantic_ai.models.openai import OpenAIChatModel
@@ -160,13 +158,15 @@ You can access multiple models with the same API key, as shown in the code snipp
     If you're using a different upstream provider, you can specify it in the route parameter:
 
     ```python {title="routing_via_provider.py"}
-    from pydantic_ai import Agent
-
     from pydantic_ai import Agent
     from pydantic_ai.providers.gateway import gateway_provider
     from pydantic_ai.models.openai import OpenAIChatModel
 
-    provider = gateway_provider('openai', api_key='PYDANTIC_AI_GATEWAY_API_KEY', route='modal-ai')
+    provider = gateway_provider(
+        'openai',
+        api_key='PYDANTIC_AI_GATEWAY_API_KEY',
+        route='modal-ai'
+    )
     model = OpenAIChatModel('gpt-5', provider=provider)
     agent = Agent(model)