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/qmediaserviceprovider/tst_qmediaserviceprovider.cpp

@@ -96,7 +96,7 @@ void tst_QMediaServiceProvider::initTestCase()
 
 void tst_QMediaServiceProvider::testDefaultProviderAvailable()
 {
-    // Must always be a default provider available    
+    // Must always be a default provider available
     QVERIFY(QMediaServiceProvider::defaultServiceProvider() != 0);
 }