Update app.py

app.py

@@ -887,7 +887,7 @@ class NutrientCalculator:
 
         total_weight = sum(c['weight'] for c in candidates)
         for candidate in candidates:
-           share = candidate['weight'] / total_weight
+            share = candidate['weight'] / total_weight
             ppm_to_apply = needed * share
             self._apply(candidate['name'], element, ppm_to_apply)
                     })