corrected a last minute bug

Author: wumpz

src/test/java/net/sf/jsqlparser/util/cnfexpression/CloneHelperTest.java

@@ -32,15 +32,15 @@ public void testChangeBack() {
         MultipleExpression ors = transform( Arrays.asList("a>b", "5=a", "b=c", "a>c"));
         Expression expr = CloneHelper.changeBack(true, ors);
         assertThat(expr).isInstanceOf(Parenthesis.class);
-        assertThat(expr.toString()).isEqualTo("a > b OR 5 = a OR b = c OR a > c");
+        assertThat(expr.toString()).isEqualTo("(a > b OR 5 = a OR b = c OR a > c)");
     }
 
     @Test
     public void testChangeBackOddNumberOfExpressions() {
         MultipleExpression ors = transform( Arrays.asList("a>b", "5=a", "b=c", "a>c", "e<f"));
         Expression expr = CloneHelper.changeBack(true, ors);
         assertThat(expr).isInstanceOf(Parenthesis.class);
-        assertThat(expr.toString()).isEqualTo("a > b OR 5 = a OR b = c OR a > c OR e < f");
+        assertThat(expr.toString()).isEqualTo("(a > b OR 5 = a OR b = c OR a > c OR e < f)");
     }
 
     private static MultipleExpression transform(List<String> expressions) {