allowed chained make statements and chained head scopes!

Author: LSafer

src/main/java/org/jamplate/scope/AbstractHeadScope.java

@@ -22,7 +22,7 @@
  * <p>
  * Relations:
  * <ul>
- *     <li>Previous: null</li>
+ *     <li>Previous: {@link HeadScope}</li>
  *     <li>Next: {@link Scope}</li>
  * </ul>
  *
@@ -34,6 +34,7 @@ public abstract class AbstractHeadScope extends AbstractScope implements HeadSco
 	@Override
 	public boolean tryAttachTo(Scope scope) {
 		Objects.requireNonNull(scope, "scope");
-		return false;
+		return scope instanceof HeadScope &&
+			   super.tryAttachTo(scope);
 	}
 }

src/main/java/org/jamplate/scope/HeadScope.java

@@ -20,7 +20,7 @@
  * <p>
  * Relations:
  * <ul>
- *     <li>Previous: null</li>
+ *     <li>Previous: {@link HeadScope}</li>
  *     <li>Next: {@link Scope}</li>
  * </ul>
  *

src/main/java/org/jamplate/scope/Make.java

@@ -32,7 +32,7 @@
  * <p>
  * Relations:
  * <ul>
- *     <li>Previous: null</li>
+ *     <li>Previous: {@link Make}</li>
  *     <li>Next: {@link Scope}</li>
  * </ul>
  *
@@ -108,4 +108,10 @@ public String toString() {
 
 		return joiner.toString();
 	}
+
+	@Override
+	public boolean tryAttachTo(Scope scope) {
+		return scope instanceof Make &&
+			   super.tryAttachTo(scope);
+	}
 }