chore(trace): bump copyright year to 2020, tweak docstring formatting (via synth)

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Commits in this repo since last synth:
01b7fb9 docs(bigquery): typo fix (#10209)
9ad21f4 feat(core): change default api_request() timeout to non-None (#10219)
8a0e129 fix(automl): fix TablesClient.predict for array and struct (#9991)
7e36fda deprecate(bigquery): deprecate client.dataset() in favor of DatasetReference (#7753)
73eac04 chore(recommender): release 0.2.0 (#10204)
c411e14 feat(recommender): add v1, set release level to beta (#10170)
8e7b7f8 feat(api_core): add retry param into PollingFuture() and it's inheritors (#9923)
0280a94 feat(bigquery): check rows argument type in insert_rows() (#10174)
3c4335d feat(bigquerydatatransfer): add service_account_name option to transfer configs (#10013)
a51da49 test(datacatalog): run unit tests with Python 3.8 (#10014)
c61c238 fix: be permssive about merging an empty struct (#10079)
bda44b3 chore(pubsub): add Python 3.8 unit tests run (via synth)
ae54dc3 feat(bigquery): check json_rows arg type in insert_rows_json() (#10162)
ae7ef87 chore(pubsub): declaratively drop Python 3.4 support (#10168)
d262e9e chores(storage): release 1.25.0 (#10165)
cae942b chore(storage): bump core dependency to 1.2.0 (#10160)
d44e9bf docs(pubsub): tiny spelling mistake fix (#10163)
4886d77 docs(language): fixes typo in Natural Language samples (#10134)
b492bdc fix(bigquerystorage): resume reader connection on EOS internal error (#9994)
7a64502 fix: replace unsafe six.PY3 with PY2 for better future compatibility with Python 4 (#10081)
c71d5f8 refactor(bigquery): to_dataframe uses faster to_arrow + to_pandas when pyarrow is available (#10027)
121394c fix(bigquerystorage): to_dataframe on an arrow stream uses 2x faster to_arrow + to_pandas, internally (#9997)
c05ffe7 chore(core): release core 1.2.0 (#10135)
4b7444a chores(core): bump api-core dependency to 1.16.0 (#10111)
54eac56 docs(spanner): fix Instance.update() docstrings (#10106)
9de4ca1 chore(api_core): release 1.16.0 (#10109)
a0a062d feat(bigtable): support requested_policy_version for Instance IAM (#10001)
9b856cf feat(storage): support optionsRequestedPolicyVersion (#9989)
d897d56 fix(bigquery): write pandas datetime[ns] columns to BigQuery TIMESTAMP columns (#10028)
70fe9b4 fix(logging): update test assertion and core version pins (#10087)
240f381 feat(bigquery): add RowIterator.to_dataframe_iterable method to get pandas DataFrame per page (#10017)
3bb565b fix(storage): fix document of delete blob (#10015)
5ad6287 fix(translate): update test assertion and core version pins (#10098)
561dced fix(dns): update test assertion and core version pins (#10096)
755eb36 fix(resourcemanager): update test assertion and core version pin (#10095)
b144fbf fix(runtimeconfig): update test assertion and core version pins (#10097)
c25d741 feat(api_core): support version 3 policy bindings (#9869)
fafead7 chore(recommender): correct config path in synth file for recommender (#10076)
20cf3b2 chore(cloudbuild): fix broken synth file (#10077)
0384238 fix(bigquery): fix minimum version of dependency (#10016)
be8e6d4 doc(automl): add example for creating a TablesClient for EU in docstring (#9825)

Log from Synthtool

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/trace/synth.py. synthtool > Ensuring dependencies. synthtool > Pulling artman image. latest: Pulling from googleapis/artman Digest: sha256:19e945954fc960a4bdfee6cb34695898ab21a8cf0bac063ee39b91f00a1faec8 Status: Image is up to date for googleapis/artman:latest synthtool > Cloning googleapis. synthtool > Running generator for google/devtools/cloudtrace/artman_cloudtrace_v1.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v1. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudtrace/v1/trace.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v1/google/cloud/trace_v1/proto/trace.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v1/google/cloud/trace_v1/proto. synthtool > Replaced 'from google.devtools.cloudtrace_v1.proto import ' in google/cloud/trace_v1/proto/trace_pb2_grpc.py. synthtool > Running generator for google/devtools/cloudtrace/artman_cloudtrace_v2.yaml. synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2. synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudtrace/v2/trace.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2/google/cloud/trace_v2/proto/trace.proto synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudtrace/v2/tracing.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2/google/cloud/trace_v2/proto/tracing.proto synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/trace-v2/google/cloud/trace_v2/proto. synthtool > Replaced 'from google.devtools.cloudtrace_v2.proto import ' in google/cloud/trace_v2/proto/tracing_pb2.py. synthtool > Replaced 'from google.devtools.cloudtrace_v2.proto import ' in google/cloud/trace_v2/proto/tracing_pb2_grpc.py. .coveragerc .flake8 MANIFEST.in docs/_static/custom.css docs/_templates/layout.html noxfile.py.j2 setup.cfg Running session blacken Creating virtual environment (virtualenv) using python3.6 in .nox/blacken pip install black black google tests docs reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/docs/conf.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/trace_service_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/transports/trace_service_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/types.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/__init__.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/proto/trace_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/enums.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/trace_service_client_config.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/transports/trace_service_grpc_transport.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/gapic/trace_service_client.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/trace_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/gapic/trace_service_client.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/tracing_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/tracing_pb2_grpc.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/types.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/tests/unit/gapic/v2/test_trace_service_client_v2.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/tests/unit/gapic/v1/test_trace_service_client_v1.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v1/proto/trace_pb2.py reformatted /tmpfs/src/git/autosynth/working_repo/trace/google/cloud/trace_v2/proto/trace_pb2.py All done! ✨ 🍰 ✨ 21 files reformatted, 24 files left unchanged. Session blacken was successful. synthtool > Wrote metadata to synth.metadata.