prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  styling of categories in dashboard (Safari)
  When using Safari the styling of categories in the dashboard is broken. 
  
  ![safari styling issue](https://user-images.githubusercontent.com/15954895/28914159-fe84edde-783a-11e7-8ae4-09f0a6b978cd.png)
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `euth/ideas/forms.py`
  Content:
  ```
  1 from adhocracy4.categories import forms as category_forms
  2 
  3 from . import models
  4 
  5 
  6 class IdeaForm(category_forms.CategorizableForm):
  7     class Meta:
  8         model = models.Idea
  9         fields = ['name', 'description', 'image', 'category']
  10
  ```
  --- 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()
  
  ```
  
golden_diff: diff --git a/euth/ideas/forms.py b/euth/ideas/forms.py
  --- a/euth/ideas/forms.py
  +++ b/euth/ideas/forms.py
  @@ -7,3 +7,7 @@
       class Meta:
           model = models.Idea
           fields = ['name', 'description', 'image', 'category']
  +
  +    def __init__(self, *args, **kwargs):
  +        super().__init__(*args, **kwargs)
  +        self.fields['category'].empty_label = '---'
  
verification_info: {"golden_diff": "diff --git a/euth/ideas/forms.py b/euth/ideas/forms.py\n--- a/euth/ideas/forms.py\n+++ b/euth/ideas/forms.py\n@@ -7,3 +7,7 @@\n     class Meta:\n         model = models.Idea\n         fields = ['name', 'description', 'image', 'category']\n+\n+    def __init__(self, *args, **kwargs):\n+        super().__init__(*args, **kwargs)\n+        self.fields['category'].empty_label = '---'\n", "issue": "styling of categories in dashboard (Safari)\nWhen using Safari the styling of categories in the dashboard is broken. \r\n\r\n![safari styling issue](https://user-images.githubusercontent.com/15954895/28914159-fe84edde-783a-11e7-8ae4-09f0a6b978cd.png)\r\n\n", "before_files": [{"content": "from adhocracy4.categories import forms as category_forms\n\nfrom . import models\n\n\nclass IdeaForm(category_forms.CategorizableForm):\n    class Meta:\n        model = models.Idea\n        fields = ['name', 'description', 'image', 'category']\n", "path": "euth/ideas/forms.py"}], "after_files": [{"content": "from adhocracy4.categories import forms as category_forms\n\nfrom . import models\n\n\nclass IdeaForm(category_forms.CategorizableForm):\n    class Meta:\n        model = models.Idea\n        fields = ['name', 'description', 'image', 'category']\n\n    def __init__(self, *args, **kwargs):\n        super().__init__(*args, **kwargs)\n        self.fields['category'].empty_label = '---'\n", "path": "euth/ideas/forms.py"}]}