chore: update docstring formatting; update templates (via synth)

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2020-04-22 05:25:07,101 synthtool > Executing /tmpfs/src/git/autosynth/working_repo/synth.py.
On branch autosynth
nothing to commit, working tree clean
2020-04-22 05:25:07,164 synthtool > Ensuring dependencies.
2020-04-22 05:25:07,753 synthtool > Cloning googleapis.
2020-04-22 05:25:08,404 synthtool > Generating code for: //google/devtools/cloudtrace/v1:devtools-cloudtrace-v1-py.
2020-04-22 05:25:11,761 synthtool > Copy: google/devtools/cloudtrace/v1/trace.proto to /tmpfs/tmp/tmpx47avxpw/google/cloud/trace_v1/proto/trace.proto
2020-04-22 05:25:11,762 synthtool > Placed proto files into /tmpfs/tmp/tmpx47avxpw/google/cloud/trace_v1/proto.
2020-04-22 05:25:11,762 synthtool > Generated code into /tmpfs/tmp/tmpx47avxpw.
2020-04-22 05:25:11,772 synthtool > Replaced 'from google.cloud.devtools.cloudtrace_v1.proto import ' in google/cloud/trace_v1/proto/trace_pb2_grpc.py.
2020-04-22 05:25:11,775 synthtool > Replaced 'google-cloud-devtools-cloudtrace' in google/cloud/trace_v1/gapic/trace_service_client.py.
2020-04-22 05:25:11,776 synthtool > Generating code for: //google/devtools/cloudtrace/v2:devtools-cloudtrace-v2-py.
2020-04-22 05:25:15,315 synthtool > Copy: google/devtools/cloudtrace/v2/trace.proto to /tmpfs/tmp/tmpzoumup5a/google/cloud/trace_v2/proto/trace.proto
2020-04-22 05:25:15,315 synthtool > Copy: google/devtools/cloudtrace/v2/tracing.proto to /tmpfs/tmp/tmpzoumup5a/google/cloud/trace_v2/proto/tracing.proto
2020-04-22 05:25:15,315 synthtool > Placed proto files into /tmpfs/tmp/tmpzoumup5a/google/cloud/trace_v2/proto.
2020-04-22 05:25:15,315 synthtool > Generated code into /tmpfs/tmp/tmpzoumup5a.
2020-04-22 05:25:15,326 synthtool > Replaced 'from google.cloud.devtools.cloudtrace_v2.proto import ' in google/cloud/trace_v2/proto/tracing_pb2_grpc.py.
2020-04-22 05:25:15,326 synthtool > Replaced 'from google.cloud.devtools.cloudtrace_v2.proto import ' in google/cloud/trace_v2/proto/tracing_pb2.py.
2020-04-22 05:25:15,327 synthtool > Replaced 'google-cloud-devtools-cloudtrace' in google/cloud/trace_v2/gapic/trace_service_client.py.
.coveragerc
.flake8
.github/CONTRIBUTING.md
.github/ISSUE_TEMPLATE/bug_report.md
.github/ISSUE_TEMPLATE/feature_request.md
.github/ISSUE_TEMPLATE/support_request.md
.github/PULL_REQUEST_TEMPLATE.md
.github/release-please.yml
.gitignore
.kokoro/build.sh
.kokoro/continuous/common.cfg
.kokoro/continuous/continuous.cfg
.kokoro/docs/common.cfg
.kokoro/docs/docs.cfg
.kokoro/presubmit/common.cfg
.kokoro/presubmit/presubmit.cfg
.kokoro/publish-docs.sh
.kokoro/release.sh
.kokoro/release/common.cfg
.kokoro/release/release.cfg
.kokoro/trampoline.sh
CODE_OF_CONDUCT.md
CONTRIBUTING.rst
LICENSE
MANIFEST.in
docs/_static/custom.css
docs/_templates/layout.html
docs/conf.py.j2
noxfile.py.j2
renovate.json
setup.cfg
Running session blacken
Creating virtual environment (virtualenv) using python3.6 in .nox/blacken
pip install black==19.3b0
black docs google tests noxfile.py setup.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/gapic/enums.py
reformatted /tmpfs/src/git/autosynth/working_repo/docs/conf.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/gapic/trace_service_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/gapic/transports/trace_service_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/types.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/proto/trace_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/gapic/enums.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/gapic/trace_service_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/gapic/transports/trace_service_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/gapic/trace_service_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/proto/trace_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/gapic/trace_service_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/proto/tracing_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/proto/tracing_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/types.py
reformatted /tmpfs/src/git/autosynth/working_repo/noxfile.py
reformatted /tmpfs/src/git/autosynth/working_repo/tests/unit/gapic/v1/test_trace_service_client_v1.py
reformatted /tmpfs/src/git/autosynth/working_repo/tests/unit/gapic/v2/test_trace_service_client_v2.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v1/proto/trace_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/google/cloud/trace_v2/proto/trace_pb2.py
All done! ✨ 🍰 ✨
22 files reformatted, 25 files left unchanged.
Session blacken was successful.
2020-04-22 05:25:20,396 synthtool > Wrote metadata to synth.metadata.