fixing typo in tooltip

Author: mach0

src/app/qgstipfactory.cpp

@@ -204,7 +204,7 @@ QgsTipFactory::QgsTipFactory() : QObject()
   myTip.setTitle(tr("Copy, paste and cut in QGIS"));
   myTip.setContent(tr("Copy, paste, and cut work as in another applications in QGIS. Select a "
                       "feature (a geometry or an attribut row in the attribute table) and use "
-                      "one of this shortcuts: Ctrl+C to copy, Ctrl+X to copy, and Ctrl+V to paste."
+                      "one of this shortcuts: Ctrl+C to copy, Ctrl+X to cut, and Ctrl+V to paste."
         ));
   addGuiTip(myTip);
   // by yjacolin