response.__str__ method, closes #268

docs/python-api.md

@@ -19,7 +19,13 @@ print(response.text())
 ```
 The `llm.get_model()` function accepts model names or aliases - so `chatgpt` would work here too.
 
-Run this command to see a list of available models and their aliases:
+The `__str__()` method of `response` also returns the text of the response, so you can do this instead:
+
+```python
+print(response)
+```
+
+You can run this command to see a list of available models and their aliases:
 
 ```bash
 llm models

llm/models.py

@@ -105,6 +105,9 @@ class Response(ABC):
         if not self._done:
             list(self)
 
+    def __str__(self) -> str:
+        return self.text()
+
     def text(self) -> str:
         self._force()
         return "".join(self._chunks)

tests/test_chat.py

@@ -10,6 +10,7 @@ def test_mock_model(mock_model):
     model = llm.get_model("mock")
     response = model.prompt(prompt="hello")
     assert response.text() == "hello world"
+    assert str(response) == "hello world"
     assert model.history[0][0].prompt == "hello"
     response2 = model.prompt(prompt="hello again")
     assert response2.text() == "second"