Various Plugins: Simplify return QStringList statements

Change-Id: Id014225851e6b9f8436387c681bea42e5de3b797
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

src/plugins/subversion/subversioneditor.cpp

@@ -85,6 +85,6 @@ QStringList SubversionEditorWidget::annotationPreviousVersions(const QString &v)
     bool ok;
     const int revision = v.toInt(&ok);
     if (!ok || revision < 2)
-        return QStringList();
+        return {};
     return QStringList(QString::number(revision - 1));
 }