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()

```

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)

{"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"}]}