old_contents: # Copyright 2018 The Cirq Developers
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Define version number here, read it from setup.py automatically,
  and warn users that the latest version of cirq uses python 3.6+"""
  
  import sys
  
  if sys.version_info < (3, 6, 0):
      # coverage: ignore
      raise SystemError(
          "You installed the latest version of cirq but aren't on python 3.6+.\n"
          'To fix this error, you need to either:\n'
          '\n'
          'A) Update to python 3.6 or later.\n'
          '- OR -\n'
          'B) Explicitly install an older deprecated-but-compatible version '
          'of cirq (e.g. "python -m pip install cirq==0.5.*")')
  
  __version__ = "0.7.0.dev"
  
new_contents: # Copyright 2018 The Cirq Developers
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  """Define version number here, read it from setup.py automatically,
  and warn users that the latest version of cirq uses python 3.6+"""
  
  import sys
  
  if sys.version_info < (3, 6, 0):
      # coverage: ignore
      raise SystemError(
          "You installed the latest version of cirq but aren't on python 3.6+.\n"
          'To fix this error, you need to either:\n'
          '\n'
          'A) Update to python 3.6 or later.\n'
          '- OR -\n'
          'B) Explicitly install an older deprecated-but-compatible version '
          'of cirq (e.g. "python -m pip install cirq==0.5.*")')
  
  __version__ = "0.8.0.dev"
  
subject: Update master to 0.8.0.dev (#2686)