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Date: Mon, 28 Jul 2025 19:56:22 +0000
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---
 fastapi/applications.py | 6 +++---
 fastapi/routing.py      | 9 +++++----
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/fastapi/applications.py b/fastapi/applications.py
index 4e42ddd88..a2fe8b349 100644
--- a/fastapi/applications.py
+++ b/fastapi/applications.py
@@ -1053,11 +1053,11 @@ class FastAPI(Starlette):
             scope["root_path"] = self.root_path
         await super().__call__(scope, receive, send)
 
-
-    def mount(self, path: str, app: ASGIApp, name: str | None = None) -> None:  # pragma: no cover
+    def mount(
+        self, path: str, app: ASGIApp, name: str | None = None
+    ) -> None:  # pragma: no cover
         self.router._mount(path, app=app, name=name)  # pragma: no cover
 
-
     def add_api_route(
         self,
         path: str,
diff --git a/fastapi/routing.py b/fastapi/routing.py
index 33019313c..cfd569cb0 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -860,19 +860,20 @@ class APIRouter(routing.Router):
         self.default_response_class = default_response_class
         self.generate_unique_id_function = generate_unique_id_function
 
-
     @deprecated(
         "Mounting sub-application on router is not supported. "
-        "Use the `mount` method of FastAPI instance instead.")
+        "Use the `mount` method of FastAPI instance instead."
+    )
     def mount(self, *args, **kwargs) -> None:  # pragma: no cover
         raise NotImplementedError(
             "APIRouter does not support mounting other ASGI applications."
         )
 
-    def _mount(self, path: str, app: ASGIApp, name: str | None = None) -> None:  # pragma: no cover
+    def _mount(
+        self, path: str, app: ASGIApp, name: str | None = None
+    ) -> None:  # pragma: no cover
         super().mount(path=path, app=app, name=name)
 
-
     def route(
         self,
         path: str,