old_contents: import mitmproxy.master  # noqa
  import mitmproxy.log  # noqa
  import mitmproxy.options  # noqa
  
  master = None  # type: "mitmproxy.master.Master"
  log = None  # type: "mitmproxy.log.Log"
  options = None  # type: "mitmproxy.options.Options"
  
new_contents: import mitmproxy.master  # noqa
  import mitmproxy.log  # noqa
  import mitmproxy.options  # noqa
  
  master = None  # type: mitmproxy.master.Master
  log = None  # type: mitmproxy.log.Log
  options = None  # type: mitmproxy.options.Options
  
subject: fix type hints for mitmproxy.ctx