fix: remove trailing whitespace (ruff W293)

Author: saumya1317

src/quant_research_starter/backtest/vectorized.py

@@ -71,18 +71,18 @@ def run(self, weight_scheme: str = "rank") -> Dict:
         # Track rebalancing
         prev_rebalance_date = None
         current_weights = pd.Series(0.0, index=self.prices.columns)
-        
+
         # Compute daily weights from signals (rebalance only on rebalance dates)
         weights_list = []
         for date in returns_df.index:
             if self._should_rebalance(date, prev_rebalance_date):
                 # Rebalance: compute new target weights
                 current_weights = self._calculate_weights(aligned_signals.loc[date], weight_scheme)
                 prev_rebalance_date = date
-            
+
             # Append current weights (maintain between rebalances)
             weights_list.append(current_weights)
-        
+
         weights = pd.DataFrame(weights_list, index=returns_df.index, columns=self.prices.columns).fillna(0.0)
 
         # Previous day weights for PnL calculation
@@ -116,18 +116,18 @@ def run(self, weight_scheme: str = "rank") -> Dict:
 
     def _should_rebalance(self, date: pd.Timestamp, prev_rebalance_date: Optional[pd.Timestamp] = None) -> bool:
         """Check if we should rebalance on given date.
-        
+
         Args:
             date: Current date to check
             prev_rebalance_date: Last rebalance date (None for first rebalance)
-            
+
         Returns:
             True if should rebalance, False otherwise
         """
         # Always rebalance on first date
         if prev_rebalance_date is None:
             return True
-            
+
         if self.rebalance_freq == "D":
             # Daily rebalancing
             return True

tests/test_backtest.py

@@ -150,7 +150,7 @@ def test_rebalance_frequency_weekly(self, sample_data):
         # Count the number of times weights change
         positions = results["positions"]
         position_changes = (positions.diff().abs().sum(axis=1) > 0).sum()
-        
+
         # Should be significantly fewer than daily (100 days)
         # Approximately ~14 weeks in 100 days
         assert position_changes < len(prices) - 1
@@ -168,7 +168,7 @@ def test_rebalance_frequency_monthly(self, sample_data):
         # Monthly rebalancing should result in fewer position changes than weekly
         positions = results["positions"]
         position_changes = (positions.diff().abs().sum(axis=1) > 0).sum()
-        
+
         # Should be significantly fewer than daily
         # Approximately ~3 months in 100 days
         assert position_changes < len(prices) - 1
@@ -177,7 +177,7 @@ def test_rebalance_frequency_invalid(self, sample_data):
         """Test that invalid rebalance frequency raises error."""
         prices, signals = sample_data
         backtest = VectorizedBacktest(prices, signals, rebalance_freq="X")
-        
+
         with pytest.raises(ValueError, match="Unsupported rebalance frequency"):
             backtest.run()