old_contents: from twisted.trial import unittest
  from twisted.internet import reactor
  
  from txjsonrpc.web.jsonrpc import Proxy
  from txjsonrpc import jsonrpclib
  
  from shutter.protocol import RemoteShutterFactory, ShutterJSONRPCProtocol
  
  class ShutterJSONRPCTestCase(unittest.TestCase):
      def setUp(self):
          self.port = reactor.listenTCP(8001, RemoteShutterFactory(ShutterJSONRPCProtocol()))
          self.client = Proxy('http://127.0.0.1:8001', version=jsonrpclib.VERSION_2)
      def tearDown(self):
          self.port.stopListening()
      def test_snapshots_empty(self):
      	def _result(value):
      		self.assertTrue(value['error'] is None)
      		self.assertFalse(value['result'] is None)
      		self.assertEqual(value['result'], [])
          return self.client.callRemote("snapshots", "http://programistamag.pl").addCallback(_result)
new_contents: from twisted.trial import unittest
  from twisted.internet import reactor
  
  from txjsonrpc.web.jsonrpc import Proxy
  from txjsonrpc import jsonrpclib
  
  from shutter.protocol import RemoteShutterFactory, ShutterJSONRPCProtocol
  
  class ShutterJSONRPCTestCase(unittest.TestCase):
      def setUp(self):
          self.port = reactor.listenTCP(8001, RemoteShutterFactory(ShutterJSONRPCProtocol()))
          self.client = Proxy('http://127.0.0.1:8001', version=jsonrpclib.VERSION_2)
      def tearDown(self):
          self.port.stopListening()
      def test_snapshots_empty(self):
          def _result(value):
              self.assertTrue(value['error'] is None)
              self.assertFalse(value['result'] is None)
              self.assertEqual(value['result'], [])
          return self.client.callRemote("snapshots", "http://programistamag.pl").addCallback(_result)
subject: Fix code indentation