Comment update

src/engine/wpakpowers/WpakPowerManager.java

@@ -423,7 +423,7 @@ public class WpakPowerManager {
         float scaledValue;
         mbEnums.ModificationType modificationType = mbEnums.ModificationType.ADD;
 
-        // Only subset of these used for percent heals and such
+        // Only a subset of these ModTypes used for percent heals and such
         // are multiplicative.  Everything else is additive.
 
         if (EnumSet.of(mbEnums.ModType.Health, mbEnums.ModType.Mana,