prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Docs are broken
  Looks like one of the examples still uses `n_eff`. From travis: 
  
  ```
  Exception occurred:
    File "/home/travis/build/arviz-devs/arviz/examples/plot_forest_ridge.py", line 20, in <module>
      n_eff=False)
  TypeError: plot_forest() got an unexpected keyword argument 'n_eff'
  ```
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `examples/plot_forest_ridge.py`
  Content:
  ```
  1 """
  2 Ridgeplot
  3 =========
  4 
  5 _thumb: .8, .5
  6 """
  7 import arviz as az
  8 
  9 az.style.use('arviz-darkgrid')
  10 
  11 non_centered_data = az.load_arviz_data('non_centered_eight')
  12 fig, axes = az.plot_forest(non_centered_data,
  13                            kind='ridgeplot',
  14                            var_names=['theta'],
  15                            combined=True,
  16                            textsize=11,
  17                            ridgeplot_overlap=3,
  18                            colors='white',
  19                            r_hat=False,
  20                            n_eff=False)
  21 axes[0].set_title('Estimated theta for eight schools model', fontsize=11)
  22
  ```
  --- 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/examples/plot_forest_ridge.py b/examples/plot_forest_ridge.py
  --- a/examples/plot_forest_ridge.py
  +++ b/examples/plot_forest_ridge.py
  @@ -15,7 +15,5 @@
                              combined=True,
                              textsize=11,
                              ridgeplot_overlap=3,
  -                           colors='white',
  -                           r_hat=False,
  -                           n_eff=False)
  +                           colors='white')
   axes[0].set_title('Estimated theta for eight schools model', fontsize=11)
  
verification_info: {"golden_diff": "diff --git a/examples/plot_forest_ridge.py b/examples/plot_forest_ridge.py\n--- a/examples/plot_forest_ridge.py\n+++ b/examples/plot_forest_ridge.py\n@@ -15,7 +15,5 @@\n                            combined=True,\n                            textsize=11,\n                            ridgeplot_overlap=3,\n-                           colors='white',\n-                           r_hat=False,\n-                           n_eff=False)\n+                           colors='white')\n axes[0].set_title('Estimated theta for eight schools model', fontsize=11)\n", "issue": "Docs are broken\nLooks like one of the examples still uses `n_eff`. From travis: \r\n\r\n```\r\nException occurred:\r\n  File \"/home/travis/build/arviz-devs/arviz/examples/plot_forest_ridge.py\", line 20, in <module>\r\n    n_eff=False)\r\nTypeError: plot_forest() got an unexpected keyword argument 'n_eff'\r\n```\n", "before_files": [{"content": "\"\"\"\nRidgeplot\n=========\n\n_thumb: .8, .5\n\"\"\"\nimport arviz as az\n\naz.style.use('arviz-darkgrid')\n\nnon_centered_data = az.load_arviz_data('non_centered_eight')\nfig, axes = az.plot_forest(non_centered_data,\n                           kind='ridgeplot',\n                           var_names=['theta'],\n                           combined=True,\n                           textsize=11,\n                           ridgeplot_overlap=3,\n                           colors='white',\n                           r_hat=False,\n                           n_eff=False)\naxes[0].set_title('Estimated theta for eight schools model', fontsize=11)\n", "path": "examples/plot_forest_ridge.py"}], "after_files": [{"content": "\"\"\"\nRidgeplot\n=========\n\n_thumb: .8, .5\n\"\"\"\nimport arviz as az\n\naz.style.use('arviz-darkgrid')\n\nnon_centered_data = az.load_arviz_data('non_centered_eight')\nfig, axes = az.plot_forest(non_centered_data,\n                           kind='ridgeplot',\n                           var_names=['theta'],\n                           combined=True,\n                           textsize=11,\n                           ridgeplot_overlap=3,\n                           colors='white')\naxes[0].set_title('Estimated theta for eight schools model', fontsize=11)\n", "path": "examples/plot_forest_ridge.py"}]}