Remove code examples for Python 3.8 in `templates`

docs/en/docs/advanced/templates.md

@@ -27,7 +27,7 @@ $ pip install jinja2
 * Declare a `Request` parameter in the *path operation* that will return a template.
 * Use the `templates` you created to render and return a `TemplateResponse`, pass the name of the template, the request object, and a "context" dictionary with key-value pairs to be used inside of the Jinja2 template.
 
-{* ../../docs_src/templates/tutorial001.py hl[4,11,15:18] *}
+{* ../../docs_src/templates/tutorial001_py39.py hl[4,11,15:18] *}
 
 /// note
 

tests/test_tutorial/test_templates/test_tutorial001.py

@@ -11,7 +11,7 @@ def test_main():
         shutil.rmtree("./templates")
     shutil.copytree("./docs_src/templates/templates/", "./templates")
     shutil.copytree("./docs_src/templates/static/", "./static")
-    from docs_src.templates.tutorial001 import app
+    from docs_src.templates.tutorial001_py39 import app
 
     client = TestClient(app)
     response = client.get("/items/foo")