We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
too much space below video, not deletable in wagtail 
![wagtail bug](https://cloud.githubusercontent.com/assets/24652917/21648586/c86d744c-d29e-11e6-83b0-120667f43c41.jpg)


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `home/wagtail_hooks.py`
Content:
```
1 from django.conf import settings
2 from django.utils.html import format_html
3 from wagtail.wagtailcore import hooks
4 
5 
6 @hooks.register('insert_editor_css')
7 def editor_css():
8     return format_html('<link rel="stylesheet" href="'
9                        + settings.STATIC_URL
10                        + 'scss/wagtail_admin/wagtail_admin.css">')
11
```
--- 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/home/wagtail_hooks.py b/home/wagtail_hooks.py
--- a/home/wagtail_hooks.py
+++ b/home/wagtail_hooks.py
@@ -7,4 +7,4 @@
 def editor_css():
     return format_html('<link rel="stylesheet" href="'
                        + settings.STATIC_URL
-                       + 'scss/wagtail_admin/wagtail_admin.css">')
+                       + 'wagtail_admin.css">')

{"golden_diff": "diff --git a/home/wagtail_hooks.py b/home/wagtail_hooks.py\n--- a/home/wagtail_hooks.py\n+++ b/home/wagtail_hooks.py\n@@ -7,4 +7,4 @@\n def editor_css():\n     return format_html('<link rel=\"stylesheet\" href=\"'\n                        + settings.STATIC_URL\n-                       + 'scss/wagtail_admin/wagtail_admin.css\">')\n+                       + 'wagtail_admin.css\">')\n", "issue": "too much space below video, not deletable in wagtail \n![wagtail bug](https://cloud.githubusercontent.com/assets/24652917/21648586/c86d744c-d29e-11e6-83b0-120667f43c41.jpg)\r\n\n", "before_files": [{"content": "from django.conf import settings\nfrom django.utils.html import format_html\nfrom wagtail.wagtailcore import hooks\n\n\n@hooks.register('insert_editor_css')\ndef editor_css():\n    return format_html('<link rel=\"stylesheet\" href=\"'\n                       + settings.STATIC_URL\n                       + 'scss/wagtail_admin/wagtail_admin.css\">')\n", "path": "home/wagtail_hooks.py"}], "after_files": [{"content": "from django.conf import settings\nfrom django.utils.html import format_html\nfrom wagtail.wagtailcore import hooks\n\n\n@hooks.register('insert_editor_css')\ndef editor_css():\n    return format_html('<link rel=\"stylesheet\" href=\"'\n                       + settings.STATIC_URL\n                       + 'wagtail_admin.css\">')\n", "path": "home/wagtail_hooks.py"}]}