messagesadapter: do not use .arg() for printing messages

This breaks messages with %Num inside. .arg() is useful for
l20n but here we don't care as the two arguments will always be
in the same order.

GitLab: #529
Change-Id: I018bdecdf51d30be887ab4a50ef54401f2f34235

src/messagesadapter.cpp

@@ -400,9 +400,9 @@ MessagesAdapter::updateHistory(lrc::api::ConversationModel& conversationModel,
     auto conversationId = lrcInstance_->get_selectedConvUid();
     auto interactionsStr
         = interactionsToJsonArrayObject(conversationModel, conversationId, interactions).toUtf8();
-    QString s = QString::fromLatin1("updateHistory(%1, %2);")
-                    .arg(interactionsStr.constData())
-                    .arg(allLoaded);
+    QString s;
+    QTextStream out(&s);
+    out << "updateHistory(" << interactionsStr << ", " << (allLoaded? "true" : "false") << ");";
     QMetaObject::invokeMethod(qmlObj_, "webViewRunJavaScript", Q_ARG(QVariant, s));
     conversationModel.clearUnreadInteractions(conversationId);
 }