aider: Passed temp_dir as the cwd to subprocess in test_main_with_empty_git_dir_new_file.

# Context:
USER: pass temp_dir as the cwd to subprocess in test_main_with_empty_git_dir_new_file
ASSISTANT: Here's the change to pass `temp_dir` as the `cwd` to `subprocess` in the `test_main_with_empty_git_dir_new_file` function:

```python
tests/test_main.py
<<<<<<< ORIGINAL
            subprocess.run(["git", "init"])
=======
            subprocess.run(["git", "init"], cwd=temp_dir)
>>>>>>> UPDATED
```

tests/test_main.py

@@ -29,7 +29,7 @@ class TestMain(TestCase):
     def test_main_with_empty_git_dir_new_file(self):
         with tempfile.TemporaryDirectory() as temp_dir:
             os.chdir(temp_dir)
-            subprocess.run(["git", "init"])
+            subprocess.run(["git", "init"], cwd=temp_dir)
             with open(os.devnull, "r") as dev_null:
                 save_stdin = sys.stdin
                 sys.stdin = dev_null