Error_reporting: pick up stub docstring fix in GAPIC generator.

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/error_reporting/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:bfb92654b4a77368471f70e2808eaf4e60f263b9559f27bb3284097322787bf1
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/devtools/clouderrorreporting/artman_errorreporting.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/error-reporting-v1beta1.
synthtool > Replaced 'from google.devtools.clouderrorreporting_v1beta1.proto import ' in google/cloud/errorreporting_v1beta1/proto/report_errors_service_pb2.py.
synthtool > Replaced 'from google.devtools.clouderrorreporting_v1beta1.proto import ' in google/cloud/errorreporting_v1beta1/proto/report_errors_service_pb2_grpc.py.
synthtool > Replaced 'from google.devtools.clouderrorreporting_v1beta1.proto import ' in google/cloud/errorreporting_v1beta1/proto/error_group_service_pb2_grpc.py.
synthtool > Replaced 'from google.devtools.clouderrorreporting_v1beta1.proto import ' in google/cloud/errorreporting_v1beta1/proto/error_stats_service_pb2.py.
synthtool > Replaced 'from google.devtools.clouderrorreporting_v1beta1.proto import ' in google/cloud/errorreporting_v1beta1/proto/error_group_service_pb2.py.
synthtool > Replaced 'from google.devtools.clouderrorreporting_v1beta1.proto import ' in google/cloud/errorreporting_v1beta1/proto/error_stats_service_pb2_grpc.py.
synthtool > Replaced '\n        This endpoint accepts either an OAuth token, or an API key for\n        authentication. To use an API key, append it to the URL as the value of\n        a ``key`` parameter. For example:\n\n        \\.\\. raw:: html\n        <pre>POST .*\n' in google/cloud/errorreporting_v1beta1/gapic/report_errors_service_client.py.
synthtool > Replaced '\n        This endpoint accepts either an OAuth token, or an API key for\n        authentication. To use an API key, append it to the URL as the value of\n        a ``key`` parameter. For example:\n\n        \\.\\. raw:: html\n        <pre>POST .*\n' in google/cloud/errorreporting_v1beta1/gapic/transports/report_errors_service_grpc_transport.py.
.coveragerc
.flake8
MANIFEST.in
noxfile.py.j2
setup.cfg
Running session blacken
Creating virtualenv using python3.6 in /tmpfs/src/git/autosynth/working_repo/error_reporting/.nox/blacken
pip install --upgrade black
black google tests docs
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/enums.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/error_group_service_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/error_stats_service_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/report_errors_service_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/error_group_service_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/transports/error_group_service_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/report_errors_service_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/transports/report_errors_service_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/transports/error_stats_service_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/common_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/gapic/error_stats_service_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/error_group_service_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/error_stats_service_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/error_group_service_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/report_errors_service_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/tests/system/gapic/v1beta1/test_system_report_errors_service_v1beta1.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/report_errors_service_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/tests/unit/gapic/v1beta1/test_error_group_service_client_v1beta1.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/tests/unit/gapic/v1beta1/test_report_errors_service_client_v1beta1.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/tests/unit/gapic/v1beta1/test_error_stats_service_client_v1beta1.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/common_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/error_reporting/google/cloud/errorreporting_v1beta1/proto/error_stats_service_pb2.py
All done! ✨ 🍰 ✨
22 files reformatted, 20 files left unchanged.
Session blacken was successful.
synthtool > Cleaned up 2 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[tseaver]

Flaky system test failure reported in #6987.