forgot a test, fix documentation

lib/zk.rb

@@ -115,7 +115,8 @@ def self.logger=(logger)
   #     contains a chroot path, we raise an `ArgumentError`
   #
   #     * if you don't like this for some reason, you can always use
-  #     {ZK::Client::Threaded.new} directly. You probably also hate unicorns.
+  #     {ZK::Client::Threaded.initialize Threaded.new} directly. You probably
+  #     also hate happiness and laughter.
   #
   #   @raise [ChrootPathDoesNotExistError] if a chroot path is specified,
   #     `:chroot` is `:check`, and the path does not exist.

spec/zk/module_spec.rb

@@ -12,6 +12,12 @@
       end
     end
 
+    describe %[with a chrooted connection string and a :chroot => '/path'] do
+      it %[should raise an ArgumentError] do
+        lambda { @zk = ZK.new('localhost:2181/zktest', :chroot => '/zktest') }.should raise_error(ArgumentError)
+      end
+    end
+
     describe 'with no arguments' do
       before { @zk = ZK.new }