old_contents: # -*- coding: utf-8 -*-
  """
      flask.signals
      ~~~~~~~~~~~~~
  
      Implements signals based on blinker if available, otherwise
      falls silently back to a noop
  
      :copyright: (c) 2014 by Armin Ronacher.
      :license: BSD, see LICENSE for more details.
  """
  signals_available = False
  try:
      from blinker import Namespace
      signals_available = True
  except ImportError:
      class Namespace(object):
          def signal(self, name, doc=None):
              return _FakeSignal(name, doc)
  
      class _FakeSignal(object):
          """If blinker is unavailable, create a fake class with the same
          interface that allows sending of signals but will fail with an
          error on anything else.  Instead of doing anything on send, it
          will just ignore the arguments and do nothing instead.
          """
  
          def __init__(self, name, doc=None):
              self.name = name
              self.__doc__ = doc
          def _fail(self, *args, **kwargs):
              raise RuntimeError('signalling support is unavailable '
                                 'because the blinker library is '
                                 'not installed.')
          send = lambda *a, **kw: None
          connect = disconnect = has_receivers_for = receivers_for = \
              temporarily_connected_to = connected_to = _fail
          del _fail
  
  # the namespace for code signals.  If you are not flask code, do
  # not put signals in here.  Create your own namespace instead.
  _signals = Namespace()
  
  
  # core signals.  For usage examples grep the sourcecode or consult
  # the API documentation in docs/api.rst as well as docs/signals.rst
  template_rendered = _signals.signal('template-rendered')
  request_started = _signals.signal('request-started')
  request_finished = _signals.signal('request-finished')
  request_tearing_down = _signals.signal('request-tearing-down')
  got_request_exception = _signals.signal('got-request-exception')
  appcontext_tearing_down = _signals.signal('appcontext-tearing-down')
  appcontext_pushed = _signals.signal('appcontext-pushed')
  appcontext_popped = _signals.signal('appcontext-popped')
  message_flashed = _signals.signal('message-flashed')
  
new_contents: # -*- coding: utf-8 -*-
  """
      flask.signals
      ~~~~~~~~~~~~~
  
      Implements signals based on blinker if available, otherwise
      falls silently back to a noop
  
      :copyright: (c) 2014 by Armin Ronacher.
      :license: BSD, see LICENSE for more details.
  """
  signals_available = False
  try:
      from blinker import Namespace
      signals_available = True
  except ImportError:
      class Namespace(object):
          def signal(self, name, doc=None):
              return _FakeSignal(name, doc)
  
      class _FakeSignal(object):
          """If blinker is unavailable, create a fake class with the same
          interface that allows sending of signals but will fail with an
          error on anything else.  Instead of doing anything on send, it
          will just ignore the arguments and do nothing instead.
          """
  
          def __init__(self, name, doc=None):
              self.name = name
              self.__doc__ = doc
          def _fail(self, *args, **kwargs):
              raise RuntimeError('signalling support is unavailable '
                                 'because the blinker library is '
                                 'not installed.')
          send = lambda *a, **kw: None
          connect = disconnect = has_receivers_for = receivers_for = \
              temporarily_connected_to = connected_to = _fail
          del _fail
  
  # The namespace for code signals.  If you are not flask code, do
  # not put signals in here.  Create your own namespace instead.
  _signals = Namespace()
  
  
  # Core signals.  For usage examples grep the sourcecode or consult
  # the API documentation in docs/api.rst as well as docs/signals.rst
  template_rendered = _signals.signal('template-rendered')
  request_started = _signals.signal('request-started')
  request_finished = _signals.signal('request-finished')
  request_tearing_down = _signals.signal('request-tearing-down')
  got_request_exception = _signals.signal('got-request-exception')
  appcontext_tearing_down = _signals.signal('appcontext-tearing-down')
  appcontext_pushed = _signals.signal('appcontext-pushed')
  appcontext_popped = _signals.signal('appcontext-popped')
  message_flashed = _signals.signal('message-flashed')
  
subject: Update signals.py