Fix style.

dulwich/tests/compat/test_client.py

@@ -38,7 +38,6 @@ import http.server
 
 from dulwich import (
     client,
-    errors,
     file,
     index,
     protocol,

dulwich/tests/test_client.py

@@ -385,7 +385,7 @@ class GitClientTests(TestCase):
         self.assertEqual(
             result.refs,
             {b'refs/heads/master':
-                    b'310ca9477129b8586fa2afc779c1f57cf64bba6c'})
+             b'310ca9477129b8586fa2afc779c1f57cf64bba6c'})
         self.assertEqual(self.rout.getvalue(), b'0000')