style: format code with Black

This commit fixes the style issues introduced in 2b5ca9f according to the output
from Black.

Details: #325

Author: deepsource-autofix[bot]

tests/test_minimal.py

@@ -76,6 +76,7 @@ async def test_tui_creation():
     except Exception as e:
         print(f"  ✗ TUI creation failed: {e}")
         import traceback
+
         traceback.print_exc()
         return False
 
@@ -102,6 +103,7 @@ async def test_session_store():
     except Exception as e:
         print(f"  ✗ SessionStore test failed: {e}")
         import traceback
+
         traceback.print_exc()
         return False
 
@@ -138,13 +140,16 @@ async def test_run_tui_mode():
 
         # Check run_tui
         print(f"  ✓ run_tui is: {run_tui}")
-        print(f"  ✓ run_tui is coroutine function: {asyncio.iscoroutinefunction(run_tui)}")
+        print(
+            f"  ✓ run_tui is coroutine function: {asyncio.iscoroutinefunction(run_tui)}"
+        )
 
         return True
 
     except Exception as e:
         print(f"  ✗ run_tui_mode test failed: {e}")
         import traceback
+
         traceback.print_exc()
         return False