docs: Fix formatting of request arg in docstring (#313)

* docs: Fix formatting of request arg in docstring

chore: Update gapic-generator-python to v1.9.1
PiperOrigin-RevId: 518604533

Source-Link: googleapis/googleapis@8a085ae

Source-Link: https://github.com/googleapis/googleapis-gen/commit/b2ab4b0a0ae2907e812c209198a74e0898afcb04
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiYjJhYjRiMGEwYWUyOTA3ZTgxMmMyMDkxOThhNzRlMDg5OGFmY2IwNCJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

google/cloud/datalabeling_v1beta1/services/data_labeling_service/async_client.py

@@ -1651,8 +1651,8 @@ async def sample_label_image():
 
         Args:
             request (Optional[Union[google.cloud.datalabeling_v1beta1.types.LabelImageRequest, dict]]):
-                The request object. Request message for starting an
-                image labeling task.
+                The request object. Request message for starting an image
+                labeling task.
             parent (:class:`str`):
                 Required. Name of the dataset to request labeling task,
                 format: projects/{project_id}/datasets/{dataset_id}
@@ -3065,8 +3065,7 @@ async def sample_list_instructions():
 
         Args:
             request (Optional[Union[google.cloud.datalabeling_v1beta1.types.ListInstructionsRequest, dict]]):
-                The request object. Request message for
-                ListInstructions.
+                The request object. Request message for ListInstructions.
             parent (:class:`str`):
                 Required. Instruction resource parent, format:
                 projects/{project_id}
@@ -3423,8 +3422,7 @@ async def sample_search_evaluations():
 
         Args:
             request (Optional[Union[google.cloud.datalabeling_v1beta1.types.SearchEvaluationsRequest, dict]]):
-                The request object. Request message for
-                SearchEvaluation.
+                The request object. Request message for SearchEvaluation.
             parent (:class:`str`):
                 Required. Evaluation search parent (project ID). Format:
                 "projects/{project_id}"
@@ -3962,8 +3960,7 @@ async def sample_get_evaluation_job():
 
         Args:
             request (Optional[Union[google.cloud.datalabeling_v1beta1.types.GetEvaluationJobRequest, dict]]):
-                The request object. Request message for
-                GetEvaluationJob.
+                The request object. Request message for GetEvaluationJob.
             name (:class:`str`):
                 Required. Name of the evaluation job. Format:
 

google/cloud/datalabeling_v1beta1/services/data_labeling_service/client.py

@@ -1913,8 +1913,8 @@ def sample_label_image():
 
         Args:
             request (Union[google.cloud.datalabeling_v1beta1.types.LabelImageRequest, dict]):
-                The request object. Request message for starting an
-                image labeling task.
+                The request object. Request message for starting an image
+                labeling task.
             parent (str):
                 Required. Name of the dataset to request labeling task,
                 format: projects/{project_id}/datasets/{dataset_id}
@@ -3277,8 +3277,7 @@ def sample_list_instructions():
 
         Args:
             request (Union[google.cloud.datalabeling_v1beta1.types.ListInstructionsRequest, dict]):
-                The request object. Request message for
-                ListInstructions.
+                The request object. Request message for ListInstructions.
             parent (str):
                 Required. Instruction resource parent, format:
                 projects/{project_id}
@@ -3605,8 +3604,7 @@ def sample_search_evaluations():
 
         Args:
             request (Union[google.cloud.datalabeling_v1beta1.types.SearchEvaluationsRequest, dict]):
-                The request object. Request message for
-                SearchEvaluation.
+                The request object. Request message for SearchEvaluation.
             parent (str):
                 Required. Evaluation search parent (project ID). Format:
                 "projects/{project_id}"
@@ -4138,8 +4136,7 @@ def sample_get_evaluation_job():
 
         Args:
             request (Union[google.cloud.datalabeling_v1beta1.types.GetEvaluationJobRequest, dict]):
-                The request object. Request message for
-                GetEvaluationJob.
+                The request object. Request message for GetEvaluationJob.
             name (str):
                 Required. Name of the evaluation job. Format: