prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Upgrade Ansble to 2.7 series
  ## Description
  
  SecureDrop currently uses the Ansible 2.6 series which is approaching end-of-life. Ansible major versions are supported (receive security patches) for [three major releases](https://docs.ansible.com/ansible/latest/reference_appendices/release_and_maintenance.html).
  
  We should move to Ansible 2.7 to ensure a smooth transition, which would allow us to rapidly patch should there be a need to quickly patch.
  
  ## User Stories
  
  As a developer, I want to make sure my dependencies are being maintained for security issues.
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `install_files/ansible-base/callback_plugins/ansible_version_check.py`
  Content:
  ```
  1 # -*- encoding:utf-8 -*-
  2 from __future__ import absolute_import, division, print_function, \
  3         unicode_literals
  4 
  5 import sys
  6 
  7 import ansible
  8 
  9 try:
  10     # Version 2.0+
  11     from ansible.plugins.callback import CallbackBase
  12 except ImportError:
  13     CallbackBase = object
  14 
  15 
  16 def print_red_bold(text):
  17     print('\x1b[31;1m' + text + '\x1b[0m')
  18 
  19 
  20 class CallbackModule(CallbackBase):
  21     def __init__(self):
  22         # Can't use `on_X` because this isn't forwards compatible
  23         # with Ansible 2.0+
  24         required_version = '2.6.19'  # Keep synchronized with requirements files
  25         if not ansible.__version__.startswith(required_version):
  26             print_red_bold(
  27                 "SecureDrop restriction: only Ansible {version}.*"
  28                 "is supported."
  29                 .format(version=required_version)
  30             )
  31             sys.exit(1)
  32
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/install_files/ansible-base/callback_plugins/ansible_version_check.py b/install_files/ansible-base/callback_plugins/ansible_version_check.py
  --- a/install_files/ansible-base/callback_plugins/ansible_version_check.py
  +++ b/install_files/ansible-base/callback_plugins/ansible_version_check.py
  @@ -21,7 +21,7 @@
       def __init__(self):
           # Can't use `on_X` because this isn't forwards compatible
           # with Ansible 2.0+
  -        required_version = '2.6.19'  # Keep synchronized with requirements files
  +        required_version = '2.7.13'  # Keep synchronized with requirements files
           if not ansible.__version__.startswith(required_version):
               print_red_bold(
                   "SecureDrop restriction: only Ansible {version}.*"
  
verification_info: {"golden_diff": "diff --git a/install_files/ansible-base/callback_plugins/ansible_version_check.py b/install_files/ansible-base/callback_plugins/ansible_version_check.py\n--- a/install_files/ansible-base/callback_plugins/ansible_version_check.py\n+++ b/install_files/ansible-base/callback_plugins/ansible_version_check.py\n@@ -21,7 +21,7 @@\n     def __init__(self):\n         # Can't use `on_X` because this isn't forwards compatible\n         # with Ansible 2.0+\n-        required_version = '2.6.19'  # Keep synchronized with requirements files\n+        required_version = '2.7.13'  # Keep synchronized with requirements files\n         if not ansible.__version__.startswith(required_version):\n             print_red_bold(\n                 \"SecureDrop restriction: only Ansible {version}.*\"\n", "issue": "Upgrade Ansble to 2.7 series\n## Description\r\n\r\nSecureDrop currently uses the Ansible 2.6 series which is approaching end-of-life. Ansible major versions are supported (receive security patches) for [three major releases](https://docs.ansible.com/ansible/latest/reference_appendices/release_and_maintenance.html).\r\n\r\nWe should move to Ansible 2.7 to ensure a smooth transition, which would allow us to rapidly patch should there be a need to quickly patch.\r\n\r\n## User Stories\r\n\r\nAs a developer, I want to make sure my dependencies are being maintained for security issues.\r\n\n", "before_files": [{"content": "# -*- encoding:utf-8 -*-\nfrom __future__ import absolute_import, division, print_function, \\\n        unicode_literals\n\nimport sys\n\nimport ansible\n\ntry:\n    # Version 2.0+\n    from ansible.plugins.callback import CallbackBase\nexcept ImportError:\n    CallbackBase = object\n\n\ndef print_red_bold(text):\n    print('\\x1b[31;1m' + text + '\\x1b[0m')\n\n\nclass CallbackModule(CallbackBase):\n    def __init__(self):\n        # Can't use `on_X` because this isn't forwards compatible\n        # with Ansible 2.0+\n        required_version = '2.6.19'  # Keep synchronized with requirements files\n        if not ansible.__version__.startswith(required_version):\n            print_red_bold(\n                \"SecureDrop restriction: only Ansible {version}.*\"\n                \"is supported.\"\n                .format(version=required_version)\n            )\n            sys.exit(1)\n", "path": "install_files/ansible-base/callback_plugins/ansible_version_check.py"}], "after_files": [{"content": "# -*- encoding:utf-8 -*-\nfrom __future__ import absolute_import, division, print_function, \\\n        unicode_literals\n\nimport sys\n\nimport ansible\n\ntry:\n    # Version 2.0+\n    from ansible.plugins.callback import CallbackBase\nexcept ImportError:\n    CallbackBase = object\n\n\ndef print_red_bold(text):\n    print('\\x1b[31;1m' + text + '\\x1b[0m')\n\n\nclass CallbackModule(CallbackBase):\n    def __init__(self):\n        # Can't use `on_X` because this isn't forwards compatible\n        # with Ansible 2.0+\n        required_version = '2.7.13'  # Keep synchronized with requirements files\n        if not ansible.__version__.startswith(required_version):\n            print_red_bold(\n                \"SecureDrop restriction: only Ansible {version}.*\"\n                \"is supported.\"\n                .format(version=required_version)\n            )\n            sys.exit(1)\n", "path": "install_files/ansible-base/callback_plugins/ansible_version_check.py"}]}