[pre-commit.ci] auto fixes from pre-commit.com hooks

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src/pylibsshext/sftp.pyx

@@ -16,8 +16,8 @@
 # repository.
 
 import os
-
 from collections import deque
+
 from posix.fcntl cimport O_CREAT, O_RDONLY, O_TRUNC, O_WRONLY
 
 from cpython.bytes cimport PyBytes_AS_STRING