fix diff file

src/ai_reviewer/diff.py

@@ -89,9 +89,9 @@ def parse_diff(diff_text: str) -> list[FileDiff]:
         if line.startswith("diff --git "):
             flush_file()
             header_lines = [line]
-            p = line.split()
+            parts = line.split()
-            if len(parts) >= 4 and p[3].startswith("b/"):
+            if len(parts) >= 4 and parts[3].startswith("b/"):
-                current_path = p[3][len("b/") :]
+                current_path = parts[3][len("b/") :]
             else:
                 current_path = None
             continue