revert version bump (it's now in #940) and format repository

Author: felixdivo

requirements-lint.txt

@@ -1,4 +1,4 @@
-pylint==2.6.0
-black==20.8b1
-mypy==0.790
-mypy-extensions==0.4.3
+pylint==2.3.1
+black==19.3b0
+mypy==0.740
+mypy-extensions==0.4.1

test/test_vector.py

@@ -100,9 +100,9 @@ def test_bus_creation_bitrate(self) -> None:
 
         can.interfaces.vector.canlib.xldriver.xlCanFdSetConfiguration.assert_not_called()
         can.interfaces.vector.canlib.xldriver.xlCanSetChannelBitrate.assert_called()
-        xlCanSetChannelBitrate_args = (
-            can.interfaces.vector.canlib.xldriver.xlCanSetChannelBitrate.call_args[0]
-        )
+        xlCanSetChannelBitrate_args = can.interfaces.vector.canlib.xldriver.xlCanSetChannelBitrate.call_args[
+            0
+        ]
         self.assertEqual(xlCanSetChannelBitrate_args[2], 200000)
 
     def test_bus_creation_fd(self) -> None:
@@ -152,9 +152,9 @@ def test_bus_creation_fd_bitrate_timings(self) -> None:
         can.interfaces.vector.canlib.xldriver.xlCanFdSetConfiguration.assert_called()
         can.interfaces.vector.canlib.xldriver.xlCanSetChannelBitrate.assert_not_called()
 
-        xlCanFdSetConfiguration_args = (
-            can.interfaces.vector.canlib.xldriver.xlCanFdSetConfiguration.call_args[0]
-        )
+        xlCanFdSetConfiguration_args = can.interfaces.vector.canlib.xldriver.xlCanFdSetConfiguration.call_args[
+            0
+        ]
         canFdConf = xlCanFdSetConfiguration_args[2]
         self.assertEqual(canFdConf.arbitrationBitRate, 500000)
         self.assertEqual(canFdConf.dataBitRate, 2000000)