Merge pull request #3475 from DonLakeFlyer/QStringFix

Fix string replacement

src/AutoPilotPlugins/APM/APMAirframeComponentController.cc

@@ -244,6 +244,6 @@ void APMAirframeComponentController::_paramFileDownloadFinished(QString remoteFi
 
 void APMAirframeComponentController::_paramFileDownloadError(QString errorMsg)
 {
-    qgcApp()->showMessage(tr("Param file download failed: % 1").arg(errorMsg));
+    qgcApp()->showMessage(tr("Param file download failed: %1").arg(errorMsg));
     qgcApp()->restoreOverrideCursor();
 }