Fixes after AC review for chapter 10

fpinjava-parent/fpinjava-trees-exercises/src/test/java/com/fpinjava/trees/exercise10_05/TreeTest.java

@@ -16,7 +16,7 @@ public class TreeTest {
   @Test
   public void testMin() throws Exception {
     Tree<Integer> tree = Tree.tree(4, 2, 6, 1, 3, 7, 5);
-    assertTrue(tree.max().map(i -> i.equals(1)).getOrElse(false));
+    assertTrue(tree.min().map(i -> i.equals(1)).getOrElse(false));
   }
 
   @Test
@@ -28,6 +28,6 @@ public class TreeTest {
   @Test
   public void testMin2() throws Exception {
     Tree<Integer> tree = Tree.tree(1, 2, 3, 4, 5, 6, 7);
-    assertTrue(tree.max().map(i -> i.equals(1)).getOrElse(false));
+    assertTrue(tree.min().map(i -> i.equals(1)).getOrElse(false));
   }
 }

fpinjava-parent/fpinjava-trees-solutions/src/main/java/com/fpinjava/trees/exercise10_02/Tree.java

@@ -88,7 +88,7 @@ public abstract class Tree<A extends Comparable<A>> {
     public boolean member(A value) {
       return value.compareTo(this.value) < 0
           ? left.member(value)
-          : value.compareTo(this.value) <= 0 || right.member(value);
+          : value.compareTo(this.value) == 0 || right.member(value);
     }
 
     @Override

fpinjava-parent/fpinjava-trees-solutions/src/main/java/com/fpinjava/trees/exercise10_14/Tree.java

@@ -401,7 +401,7 @@ public abstract class Tree<A extends Comparable<A>> {
     return balance_(tree.toListInOrderRight().foldLeft(Tree.<A>empty(), t -> a -> new T<>(empty(), a, t)));
   }
 
-  public static <A extends Comparable<A>> Tree<A> balance_(Tree<A> tree) {
+  private static <A extends Comparable<A>> Tree<A> balance_(Tree<A> tree) {
     return !tree.isEmpty() && tree.height() > log2nlz(tree.size())
         ? Math.abs(tree.left().height() - tree.right().height()) > 1
             ? balance_(balanceFirstLevel(tree))