title: AppCompatDialogFragment issue with appcompat-v7:23.1.0
body: <p>I updgraded <code>appcompat v7</code> from version <strong>23.0.1</strong> to version <strong>23.1.0</strong></p>
  
  <p>And I found this surprise concerning the <code>AppCompatDialogFragment</code>:<br>an extra space shows up at the top of the dialog</p>
  
  <p>Anyone else is experiencing this?</p>
  
  <p><a href="https://i.stack.imgur.com/BBB5d.png" rel="noreferrer"><img src="https://i.stack.imgur.com/BBB5d.png" alt="enter image description here"></a></p>
  
  <p>Here my code:</p>
  
  <pre><code>public class AlertDialogFragment extends AppCompatDialogFragment {
  
      public static final int ALERTDIALOG_STARTUP = 101;
      public static final int ALERTDIALOG_DELETE_SEARCH_HISTORY = 102;
      public static final int ALERTDIALOG_RATE_APP = 103;
      public static final int ALERTDIALOG_REACHED_FOLLOWS_FREE_LIMIT = 104;
      public static final int ALERTDIALOG_UNFOLLOW_ROUTE = 105;
      AlertDialogListener mListener;
  
      public static AlertDialogFragment newInstance(int type, String id, String[] params) {
          AlertDialogFragment frag = new AlertDialogFragment();
          Bundle args = new Bundle();
          args.putInt("type", type);
          args.putString("id", id);
          args.putStringArray("params", params);
          frag.setArguments(args);
          return frag;
      }
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
      }
  
      @Override
      public void onAttach(Context activity) {
          super.onAttach(activity);
          try {
              mListener = (AlertDialogListener) activity;
          } catch (ClassCastException e) {
              throw new ClassCastException(activity.toString() + " must implement AlertDialogListener");
          }
      }
  
      @Override
      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
      {
          View view = inflater.inflate(R.layout.view_alertdialog, container, false);
          int type = getArguments().getInt("type");
          String[] params = getArguments().getStringArray("params");
          switch (type) {
              case ALERTDIALOG_STARTUP:
                  setCancelable(false);
                  view = setupView(view, getString(R.string.startup_title), getString(R.string.startup_message), getString(R.string.go_to_facebook), getString(R.string.go_to_app));
                  break;
              case ALERTDIALOG_DELETE_SEARCH_HISTORY:
                  view = setupView(view, params[0], getString(R.string.remove_search_message), getString(android.R.string.yes), getString(android.R.string.no));
                  break;
              case ALERTDIALOG_RATE_APP:
                  setCancelable(false);
                  view = setupView(view, getString(R.string.rate_app_title), getString(R.string.rate_app_message), getString(R.string.rate_app_yes), getString(R.string.rate_app_no));
                  break;
              case ALERTDIALOG_REACHED_FOLLOWS_FREE_LIMIT:
                  view = setupView(view, params[0], params[1], params[2], null);
                  break;
              case ALERTDIALOG_UNFOLLOW_ROUTE:
                  view = setupView(view, params[0], getString(R.string.unfollow_route_message), getString(android.R.string.yes), getString(android.R.string.no));
                  break;
          }
          return view;
      }
  
      private View setupView(View view, String title, String text, String positiveButtonLabel, String negativeButtonLabel) {
          TextView customTitle = (TextView) view.findViewById(R.id.custom_title);
          customTitle.setText(title);
          TextView customMessage = (TextView) view.findViewById(R.id.custom_message);
          customMessage.setText(Html.fromHtml(text));
  
          if (positiveButtonLabel!=null) {
              Button positiveButton = (Button) view.findViewById(R.id.positive_button);
              positiveButton.setVisibility(View.VISIBLE);
              positiveButton.setText(positiveButtonLabel);
              positiveButton.setOnClickListener(new View.OnClickListener() {
                  public void onClick(View v) {
                      mListener.onAlertDialogPositiveClick(getArguments().getInt("type"), getArguments().getString("id"));
                      dismiss();
                  }
              });
          }
  
          if (negativeButtonLabel!=null) {
              Button negativeButton = (Button) view.findViewById(R.id.negative_button);
              negativeButton.setVisibility(View.VISIBLE);
              negativeButton.setText(negativeButtonLabel);
              negativeButton.setOnClickListener(new View.OnClickListener() {
                  public void onClick(View v) {
                      mListener.onAlertDialogNegativeClick(getArguments().getInt("type"), getArguments().getString("id"));
                      dismiss();
                  }
              });
          }
          return view;
      }
  
      public interface AlertDialogListener {
          public void onAlertDialogPositiveClick(int dialogType, String id);
          public void onAlertDialogNegativeClick(int dialogType, String id);
      }
  }
  </code></pre>
  
  <p>here is the <code>view_alertdialog.xml</code> layout file:</p>
  
  <p></p>
  
  <pre><code>&lt;LinearLayout
      android:orientation="vertical"
      android:paddingTop="@dimen/alert_dialog_padding_top"
      android:paddingLeft="@dimen/alert_dialog_padding_hor"
      android:paddingRight="@dimen/alert_dialog_padding_hor"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"&gt;
  
      &lt;TextView
          android:id="@+id/custom_title"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:textColor="@color/evidence_color"
          android:textStyle="bold"
          android:textSize="@dimen/alert_dialog_title_textsize" /&gt;
  
      &lt;TextView
          android:id="@+id/custom_message"
          android:layout_marginTop="@dimen/about_activity_paragraph_marginTop"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:textColor="@color/top_color"
          android:textSize="@dimen/alert_dialog_message_textsize" /&gt;
  
      &lt;LinearLayout
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:gravity="right"
          style="?attr/buttonBarStyle"&gt;
  
          &lt;Button
              android:id="@+id/negative_button"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="@android:string/cancel"
              android:textStyle="bold"
              android:textColor="@color/link_color"
              android:visibility="gone"
              style="?attr/buttonBarButtonStyle"/&gt;
  
          &lt;Button
              android:id="@+id/positive_button"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:text="@android:string/ok"
              android:textStyle="bold"
              android:textColor="@color/link_color"
              android:visibility="gone"
              style="?attr/buttonBarButtonStyle"/&gt;
  
      &lt;/LinearLayout&gt;
  
  &lt;/LinearLayout&gt;
  </code></pre>
  
  <p></p>