Add a test for the initWithItems:copy: fix.

Tests/Foundation/CPArrayTest.j

@@ -155,6 +155,14 @@
     }
 }
 
+- (void)testInitWithArrayCopyItems
+{
+    var a = [[CopyableObject new], 2, 3];
+    var b = [[CPArray alloc] initWithArray:a copyItems:YES];
+
+    [self assert:a notEqual:b];
+}
+
 @end
 
 @implementation CPArray (reverse)
@@ -169,3 +177,14 @@
 }
 
 @end
+
+@implementation CopyableObject : CPObject
+{
+}
+
+- (id)copy
+{
+    return [[[self class] alloc] init];
+}
+
+@end