aider: Fix import of Path from pathlib and correct split to split() in get_lines_with_commit_hash function.

# Aider chat conversation:

USER: # Fix any errors below, if possible.

## Running: flake8 --select=E9,F821,F823,F831,F406,F407,F701,F702,F704,F706 --show-source --isolated scripts/blame.py

scripts/blame.py:22:13: F821 undefined name 'Path'
    lines = Path(filename).splitlines()
            ^

## See relevant line below marked with █.

scripts/blame.py:
...⋮...
  7│def get_lines_with_commit_hash(filename):
  8│    result = subprocess.run(
  9│        ["git", "blame", "-l", filename],
 10│        capture_output=True,
 11│        text=True,
 12│        check=True
...⋮...
 19│        line.split[0]
 20│        for line in result.stdout.splitlines()
 21│    ]
 22█    lines = Path(filename).splitlines()
 23│
 24│
 25│def get_aider_commits():
...⋮...

ASSISTANT: To fix the error, we need to import the `Path` class from the `pathlib` module. Additionally, we should correct the usage of `split` to `split()` in the list comprehension.

Here are the *SEARCH/REPLACE* blocks:

scripts/blame.py
```python
<<<<<<< SEARCH
import sys
import subprocess
from aider.dump import dump
=======
import sys
import subprocess
from pathlib import Path
from aider.dump import dump
>>>>>>> REPLACE
```

scripts/blame.py
```python
<<<<<<< SEARCH
        line.split[0]
=======
        line.split()[0]
>>>>>>> REPLACE
```

scripts/blame.py
```python
<<<<<<< SEARCH
    lines = Path(filename).splitlines()
=======
    lines = Path(filename).read_text().splitlines()
>>>>>>> REPLACE
```

scripts/blame.py

@@ -2,6 +2,7 @@
 
 import sys
 import subprocess
+from pathlib import Path
 from aider.dump import dump
 
 def get_lines_with_commit_hash(filename):
@@ -16,10 +17,10 @@ def get_lines_with_commit_hash(filename):
     commit_hash = None
 
     hashes = [
-        line.split[0]
+        line.split()[0]
         for line in result.stdout.splitlines()
     ]
-    lines = Path(filename).splitlines()
+    lines = Path(filename).read_text().splitlines()
 
 
 def get_aider_commits():