Update app.py

app.py

@@ -914,7 +914,8 @@ class DataAnalysisChatbot:
                 stat, p_value = stats.shapiro(data) if len(data) < 5000 else stats.normaltest(data)
                 
                 result += f"Normality Test for '{col}':\n"
-                result += f"  Test used: {'Shapiro-Wilk' if len(data) < 5000 else \"D'Agostino's K²\"}\n"
+                test_name = "Shapiro-Wilk" if len(data) < 5000 else "D'Agostino's K²"
+                result += f"  Test used: {test_name}\n"
                 result += f"  Statistic: {stat:.4f}\n"
                 result += f"  p-value: {p_value:.4f}\n"
                 result += f"  Interpretation: The data is {'not ' if p_value < 0.05 else ''}normally distributed (95% confidence).\n\n"