whitespace fixes

remove trailing spaces & expand tabs.

Change-Id: I05ef110abed90f13b47752760ffb4567a11a6a5e
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>

tests/auto/unit/qvideowidget/tst_qvideowidget.cpp

@@ -799,7 +799,7 @@ void tst_QVideoWidget::aspectRatioRendererControl()
 void tst_QVideoWidget::sizeHint_data()
 {
     QTest::addColumn<QSize>("size");
-    
+
     QTest::newRow("720x576")
             << QSize(720, 576);
 }