Fix formatting.

dulwich/file.py

@@ -122,7 +122,8 @@ class _GitFile(object):
         try:
             fd = os.open(
                 self._lockfilename,
-                os.O_RDWR | os.O_CREAT | os.O_EXCL | getattr(os, "O_BINARY", 0))
+                os.O_RDWR | os.O_CREAT | os.O_EXCL |
+                getattr(os, "O_BINARY", 0))
         except OSError as e:
             if e.errno == errno.EEXIST:
                 raise FileLocked(filename, self._lockfilename)

dulwich/tests/test_file.py

@@ -18,7 +18,6 @@
 # License, Version 2.0.
 #
 
-import errno
 import io
 import os
 import shutil