Lint cleanup.

app/src/main/java/com/majinnaibu/monstercards/models/Skill.java

@@ -49,7 +49,7 @@ public class Skill implements Comparator<Skill>, Comparable<Skill> {
 
         return String.format(
                 "%s%s %+d%s",
-                name.substring(0, 1),
+                name.charAt(0),
                 name.substring(1),
                 bonus,
                 advantageType == AdvantageType.ADVANTAGE ? " A" : advantageType == AdvantageType.DISADVANTAGE ? " D" : ""

app/src/main/java/com/majinnaibu/monstercards/ui/editmonster/EditSkillsFragment.java

@@ -24,6 +24,7 @@ import com.majinnaibu.monstercards.ui.shared.SwipeToDeleteCallback;
 /**
  * A fragment representing a list of Items.
  */
+@SuppressWarnings("FieldCanBeLocal")
 public class EditSkillsFragment extends Fragment {
     private EditMonsterViewModel mViewModel;
     private ViewHolder mHolder;