We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
ParamScheduler docs missing
No docs on `ParamScheduler` and related classes on the [site](https://pytorch.org/ignite/contrib/handlers.html).

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `ignite/contrib/handlers/__init__.py`
Content:
```
1 
2 from ignite.contrib.handlers.param_scheduler import ParamScheduler, CyclicalScheduler, \
3     LinearCyclicalScheduler, CosineAnnealingScheduler
4 
5 from ignite.contrib.handlers.tqdm_logger import ProgressBar
6 
7 __all__ = ['ProgressBar']
8
```

Path: `ignite/contrib/engines/__init__.py`
Content:
```
1 # coding: utf-8
2 
3 from ignite.contrib.engines.tbptt import create_supervised_tbptt_trainer
4 from ignite.contrib.engines.tbptt import Tbptt_Events
5 
6 
7 __all__ = ["create_supervised_tbptt_trainer", "Tbptt_Events"]
8
```
--- 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/ignite/contrib/engines/__init__.py b/ignite/contrib/engines/__init__.py
--- a/ignite/contrib/engines/__init__.py
+++ b/ignite/contrib/engines/__init__.py
@@ -2,6 +2,3 @@
 
 from ignite.contrib.engines.tbptt import create_supervised_tbptt_trainer
 from ignite.contrib.engines.tbptt import Tbptt_Events
-
-
-__all__ = ["create_supervised_tbptt_trainer", "Tbptt_Events"]
diff --git a/ignite/contrib/handlers/__init__.py b/ignite/contrib/handlers/__init__.py
--- a/ignite/contrib/handlers/__init__.py
+++ b/ignite/contrib/handlers/__init__.py
@@ -3,5 +3,3 @@
     LinearCyclicalScheduler, CosineAnnealingScheduler
 
 from ignite.contrib.handlers.tqdm_logger import ProgressBar
-
-__all__ = ['ProgressBar']

{"golden_diff": "diff --git a/ignite/contrib/engines/__init__.py b/ignite/contrib/engines/__init__.py\n--- a/ignite/contrib/engines/__init__.py\n+++ b/ignite/contrib/engines/__init__.py\n@@ -2,6 +2,3 @@\n \n from ignite.contrib.engines.tbptt import create_supervised_tbptt_trainer\n from ignite.contrib.engines.tbptt import Tbptt_Events\n-\n-\n-__all__ = [\"create_supervised_tbptt_trainer\", \"Tbptt_Events\"]\ndiff --git a/ignite/contrib/handlers/__init__.py b/ignite/contrib/handlers/__init__.py\n--- a/ignite/contrib/handlers/__init__.py\n+++ b/ignite/contrib/handlers/__init__.py\n@@ -3,5 +3,3 @@\n     LinearCyclicalScheduler, CosineAnnealingScheduler\n \n from ignite.contrib.handlers.tqdm_logger import ProgressBar\n-\n-__all__ = ['ProgressBar']\n", "issue": "ParamScheduler docs missing\nNo docs on `ParamScheduler` and related classes on the [site](https://pytorch.org/ignite/contrib/handlers.html).\n", "before_files": [{"content": "\nfrom ignite.contrib.handlers.param_scheduler import ParamScheduler, CyclicalScheduler, \\\n    LinearCyclicalScheduler, CosineAnnealingScheduler\n\nfrom ignite.contrib.handlers.tqdm_logger import ProgressBar\n\n__all__ = ['ProgressBar']\n", "path": "ignite/contrib/handlers/__init__.py"}, {"content": "# coding: utf-8\n\nfrom ignite.contrib.engines.tbptt import create_supervised_tbptt_trainer\nfrom ignite.contrib.engines.tbptt import Tbptt_Events\n\n\n__all__ = [\"create_supervised_tbptt_trainer\", \"Tbptt_Events\"]\n", "path": "ignite/contrib/engines/__init__.py"}], "after_files": [{"content": "\nfrom ignite.contrib.handlers.param_scheduler import ParamScheduler, CyclicalScheduler, \\\n    LinearCyclicalScheduler, CosineAnnealingScheduler\n\nfrom ignite.contrib.handlers.tqdm_logger import ProgressBar\n", "path": "ignite/contrib/handlers/__init__.py"}, {"content": "# coding: utf-8\n\nfrom ignite.contrib.engines.tbptt import create_supervised_tbptt_trainer\nfrom ignite.contrib.engines.tbptt import Tbptt_Events\n", "path": "ignite/contrib/engines/__init__.py"}]}