We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Typo in wagtail/core/middleware.py warning
The second line of the warning in `wagtail/core/middleware.py` should read:

`    'Please update your code to use Site.find_for_request(request) in place of request.site, '`

instead of:

`    'Please update your code to use Site.get_for_request(request) in place of request.site, '`


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `wagtail/core/middleware.py`
Content:
```
1 import warnings
2 
3 from django.utils.deprecation import MiddlewareMixin
4 from wagtail.core.models import Site
5 from wagtail.utils.deprecation import RemovedInWagtail211Warning
6 
7 
8 warnings.warn(
9     'wagtail.core.middleware.SiteMiddleware and the use of request.site is deprecated. '
10     'Please update your code to use Site.get_for_request(request) in place of request.site, '
11     'and remove wagtail.core.middleware.SiteMiddleware from MIDDLEWARES',
12     RemovedInWagtail211Warning
13 )
14 
15 
16 class SiteMiddleware(MiddlewareMixin):
17     def process_request(self, request):
18         """
19         Set request.site to contain the Site object responsible for handling this request,
20         according to hostname matching rules
21         """
22         try:
23             request.site = Site.find_for_request(request)
24         except Site.DoesNotExist:
25             request.site = None
26
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/wagtail/core/middleware.py b/wagtail/core/middleware.py
--- a/wagtail/core/middleware.py
+++ b/wagtail/core/middleware.py
@@ -7,7 +7,7 @@
 
 warnings.warn(
     'wagtail.core.middleware.SiteMiddleware and the use of request.site is deprecated. '
-    'Please update your code to use Site.get_for_request(request) in place of request.site, '
+    'Please update your code to use Site.find_for_request(request) in place of request.site, '
     'and remove wagtail.core.middleware.SiteMiddleware from MIDDLEWARES',
     RemovedInWagtail211Warning
 )

{"golden_diff": "diff --git a/wagtail/core/middleware.py b/wagtail/core/middleware.py\n--- a/wagtail/core/middleware.py\n+++ b/wagtail/core/middleware.py\n@@ -7,7 +7,7 @@\n \n warnings.warn(\n     'wagtail.core.middleware.SiteMiddleware and the use of request.site is deprecated. '\n-    'Please update your code to use Site.get_for_request(request) in place of request.site, '\n+    'Please update your code to use Site.find_for_request(request) in place of request.site, '\n     'and remove wagtail.core.middleware.SiteMiddleware from MIDDLEWARES',\n     RemovedInWagtail211Warning\n )\n", "issue": "Typo in wagtail/core/middleware.py warning\nThe second line of the warning in `wagtail/core/middleware.py` should read:\r\n\r\n`    'Please update your code to use Site.find_for_request(request) in place of request.site, '`\r\n\r\ninstead of:\r\n\r\n`    'Please update your code to use Site.get_for_request(request) in place of request.site, '`\r\n\n", "before_files": [{"content": "import warnings\n\nfrom django.utils.deprecation import MiddlewareMixin\nfrom wagtail.core.models import Site\nfrom wagtail.utils.deprecation import RemovedInWagtail211Warning\n\n\nwarnings.warn(\n    'wagtail.core.middleware.SiteMiddleware and the use of request.site is deprecated. '\n    'Please update your code to use Site.get_for_request(request) in place of request.site, '\n    'and remove wagtail.core.middleware.SiteMiddleware from MIDDLEWARES',\n    RemovedInWagtail211Warning\n)\n\n\nclass SiteMiddleware(MiddlewareMixin):\n    def process_request(self, request):\n        \"\"\"\n        Set request.site to contain the Site object responsible for handling this request,\n        according to hostname matching rules\n        \"\"\"\n        try:\n            request.site = Site.find_for_request(request)\n        except Site.DoesNotExist:\n            request.site = None\n", "path": "wagtail/core/middleware.py"}], "after_files": [{"content": "import warnings\n\nfrom django.utils.deprecation import MiddlewareMixin\nfrom wagtail.core.models import Site\nfrom wagtail.utils.deprecation import RemovedInWagtail211Warning\n\n\nwarnings.warn(\n    'wagtail.core.middleware.SiteMiddleware and the use of request.site is deprecated. '\n    'Please update your code to use Site.find_for_request(request) in place of request.site, '\n    'and remove wagtail.core.middleware.SiteMiddleware from MIDDLEWARES',\n    RemovedInWagtail211Warning\n)\n\n\nclass SiteMiddleware(MiddlewareMixin):\n    def process_request(self, request):\n        \"\"\"\n        Set request.site to contain the Site object responsible for handling this request,\n        according to hostname matching rules\n        \"\"\"\n        try:\n            request.site = Site.find_for_request(request)\n        except Site.DoesNotExist:\n            request.site = None\n", "path": "wagtail/core/middleware.py"}]}