Dymamic Values, Sigil of Distinction as example, tooltip is generated badly

Mage/src/mage/abilities/dynamicvalue/common/StaticValue.java

@@ -0,0 +1,33 @@
+package mage.abilities.dynamicvalue.common;
+
+
+import mage.abilities.Ability;
+import mage.abilities.dynamicvalue.DynamicValue;
+import mage.game.Game;
+
+public class StaticValue implements DynamicValue {
+    private int value = 0;
+
+    public StaticValue(int value) {
+        this.value = value;
+    }
+
+    public StaticValue(final StaticValue staticValue) {
+        this.value = staticValue.value;
+    }
+
+    @Override
+    public int calculate(Game game, Ability sourceAbility) {
+        return value;
+    }
+
+    @Override
+    public DynamicValue clone() {
+        return new StaticValue(this);
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%1$+d", value);
+    }
+}