aider: Replaced the usage of create_pipe_input() with create_input(StringIO('')) in the test cases.

# Context:
USER: try using create_input(StringIO('')) in the tests
ASSISTANT: I understand that you want to use `create_input(StringIO(''))` in the tests. However, I need more information about which test cases you want to apply this change to and how you want to use it. Please provide more details or examples.
USER: the ones that currently use create_pipe_input()
ASSISTANT: I see that you want to replace `create_pipe_input()` with `create_input(StringIO(''))` in the test cases. Here are the changes for the `tests/test_main.py` file:

```python
tests/test_main.py
<<<<<<< ORIGINAL
from prompt_toolkit.input import create_pipe_input
=======
from prompt_toolkit.input import create_input
from io import StringIO
>>>>>>> UPDATED
```

```python
tests/test_main.py
<<<<<<< ORIGINAL
            pipe_input = create_pipe_input()
=======
            pipe_input = create_input(StringIO(''))
>>>>>>> UPDATED
```

```python
tests/test_main.py
<<<<<<< ORIGINAL
            pipe_input = create_pipe_input()
=======
            pipe_input = create_input(StringIO(''))
>>>>>>> UPDATED
```

```python
tests/test_main.py
<<<<<<< ORIGINAL
            pipe_input = create_pipe_input()
=======
            pipe_input = create_input(StringIO(''))
>>>>>>> UPDATED
```

These changes will replace the usage of `create_pipe_input()` with `create_input(StringIO(''))` in the test cases.

tests/test_main.py

@@ -4,7 +4,8 @@ import tempfile
 from unittest import TestCase
 from aider.main import main
 import subprocess
-from prompt_toolkit.input import create_pipe_input
+from prompt_toolkit.input import create_input
+from io import StringIO
 from prompt_toolkit.output import DummyOutput
 
 
@@ -12,7 +13,7 @@ class TestMain(TestCase):
     def test_main_with_empty_dir_no_files_on_command(self):
         with tempfile.TemporaryDirectory() as temp_dir:
             os.chdir(temp_dir)
-            pipe_input = create_pipe_input()
+            pipe_input = create_input(StringIO(''))
             save_stdin = sys.stdin
             sys.stdin = pipe_input
             main([], input=pipe_input, output=DummyOutput())
@@ -22,7 +23,7 @@ class TestMain(TestCase):
     def test_main_with_empty_dir_new_file(self):
         with tempfile.TemporaryDirectory() as temp_dir:
             os.chdir(temp_dir)
-            pipe_input = create_pipe_input()
+            pipe_input = create_input(StringIO(''))
             save_stdin = sys.stdin
             sys.stdin = pipe_input
             main(["foo.txt"], input=pipe_input, output=DummyOutput())
@@ -34,7 +35,7 @@ class TestMain(TestCase):
         with tempfile.TemporaryDirectory() as temp_dir:
             os.chdir(temp_dir)
             subprocess.run(["git", "init"], cwd=temp_dir)
-            pipe_input = create_pipe_input()
+            pipe_input = create_input(StringIO(''))
             save_stdin = sys.stdin
             sys.stdin = pipe_input
             main(["--yes", "foo.txt"], input=pipe_input, output=DummyOutput())