human
Solve the following python programming problem given the following code:
@ pytest.mark.timeout (10) 
@ pytest.mark.parametrize ('ssh_command', [None, 'fake_ssh_command']) 
def test_sshkey(tmpdir, ssh_command) : 
    tmpdir = str (tmpdir) 
    test_path = os.path.dirname (os.path.realpath (__file__)) 
    with open (os.path.join (test_path, 'private_key')) as k : 
        private_key = k.read () 
abs_source = os.path.join (tmpdir, 'deploy~git') 
    dest = os.path.join (tmpdir, 'dest-dir') 
    with mock.patch ('subprocess.check_call') as submock : 
        with mock.patch ('git.Repo') as gitmock : 
            def check_environ(* args) : 
                if ssh_command : 
                    with open (os.environ ['GIT_SSH']) as gitfile : 
                        assert (ssh_command in gitfile.read ()) 
submock.check_call.side_effect = check_environ 
            url = 'git@example.org:squadron/test-repo.git' 
            version = 'a057eb0faaa8' 
            with open (abs_source, 'w') as gfile : 
                gfile.write (get_git_file (url, '@version', 'filename', '--depth=1')) 
dest = os.path.join (tmpdir, 'dest-dir2') 
            if ssh_command : 
                os.environ ['GIT_SSH'] = ssh_command 
finalfile = ext_git (expected_sub_calls, dest, { 
                'version' : version, 
}, get_loader (), { 
                'filename' : (lambda : private_key), 
}) 
            expected_sub_calls = [mock.call ('git clone --depth=1 -- {} {} '.format (url, finalfile).split ())] 
            expected_git_calls = [mock.call (finalfile), mock.call ().git.checkout (version)] 
            assert (expected_sub_calls == submock.mock_calls) 
            assert (expected_git_calls == gitmock.mock_calls) 
            if ssh_command : 
                assert ('GIT_SSH' in os.environ) 
                assert (os.environ ['GIT_SSH'] == ssh_command) 
else : 
                assert ('GIT_SSH' not in os.environ) 

    
    

    Fix the buggy line: finalfile = ext_git (expected_sub_calls, dest, {
assistant
#Here is Python program to fix the buggy line: finalfile = ext_git (expected_sub_calls, dest, {
.

finalfile = ext_git (abs_source, dest, {