diff --git a/src/plugins/diffeditor/diffeditor.cpp b/src/plugins/diffeditor/diffeditor.cpp
index 14f10ecc085..4695fa6d442 100644
--- a/src/plugins/diffeditor/diffeditor.cpp
+++ b/src/plugins/diffeditor/diffeditor.cpp
@@ -46,6 +46,7 @@ static const char ignoreWhitespaceKeyC[] = "IgnoreWhitespace";
 
 static const char diffViewKeyC[] = "DiffEditorType";
 
+using namespace Core;
 using namespace TextEditor;
 
 namespace DiffEditor {
@@ -86,10 +87,10 @@ DescriptionEditorWidget::DescriptionEditorWidget(QWidget *parent)
 
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
 
-    auto context = new Core::IContext(this);
+    auto context = new IContext(this);
     context->setWidget(this);
-    context->setContext(Core::Context(Constants::C_DIFF_EDITOR_DESCRIPTION));
-    Core::ICore::addContextObject(context);
+    context->setContext(Context(Constants::C_DIFF_EDITOR_DESCRIPTION));
+    ICore::addContextObject(context);
 
     textDocument()->setSyntaxHighlighter(new SyntaxHighlighter);
 }
@@ -113,7 +114,7 @@ void DescriptionEditorWidget::setDisplaySettings(const DisplaySettings &ds)
 void DescriptionEditorWidget::setMarginSettings(const MarginSettings &ms)
 {
     Q_UNUSED(ms)
-    TextEditorWidget::setMarginSettings(MarginSettings());
+    TextEditorWidget::setMarginSettings({});
 }
 
 void DescriptionEditorWidget::applyFontSettings()
@@ -130,11 +131,11 @@ DiffEditor::DiffEditor()
     setDuplicateSupported(true);
 
     // Widget:
-    QSplitter *splitter = new Core::MiniSplitter(Qt::Vertical);
+    QSplitter *splitter = new MiniSplitter(Qt::Vertical);
 
     m_descriptionWidget = new DescriptionEditorWidget(splitter);
     m_descriptionWidget->setReadOnly(true);
-    connect(m_descriptionWidget, &DescriptionEditorWidget::requestResize, this, [splitter](){
+    connect(m_descriptionWidget, &DescriptionEditorWidget::requestResize, this, [splitter] {
         if (splitter->count() == 0)
             return;
         QList<int> sizes = splitter->sizes();
@@ -189,16 +190,16 @@ DiffEditor::DiffEditor()
     m_whitespaceButtonAction = m_toolBar->addAction(tr("Ignore Whitespace"));
     m_whitespaceButtonAction->setCheckable(true);
 
-    m_toggleDescriptionAction = m_toolBar->addAction(Icons::TOP_BAR.icon(), QString());
+    m_toggleDescriptionAction = m_toolBar->addAction(Icons::TOP_BAR.icon(), {});
     m_toggleDescriptionAction->setCheckable(true);
 
     m_reloadAction = m_toolBar->addAction(Utils::Icons::RELOAD_TOOLBAR.icon(), tr("Reload Diff"));
     m_reloadAction->setToolTip(tr("Reload Diff"));
 
-    m_toggleSyncAction = m_toolBar->addAction(Utils::Icons::LINK_TOOLBAR.icon(), QString());
+    m_toggleSyncAction = m_toolBar->addAction(Utils::Icons::LINK_TOOLBAR.icon(), {});
     m_toggleSyncAction->setCheckable(true);
 
-    m_viewSwitcherAction = m_toolBar->addAction(QIcon(), QString());
+    m_viewSwitcherAction = m_toolBar->addAction(QIcon(), {});
 
     connect(m_whitespaceButtonAction, &QAction::toggled,
             this, &DiffEditor::ignoreWhitespaceHasChanged);
@@ -206,7 +207,7 @@ DiffEditor::DiffEditor()
             this, &DiffEditor::contextLineCountHasChanged);
     connect(m_toggleSyncAction, &QAction::toggled, this, &DiffEditor::toggleSync);
     connect(m_toggleDescriptionAction, &QAction::toggled, this, &DiffEditor::toggleDescription);
-    connect(m_viewSwitcherAction, &QAction::triggered, this, [this]() { showDiffView(nextView()); });
+    connect(m_viewSwitcherAction, &QAction::triggered, this, [this] { showDiffView(nextView()); });
 }
 
 void DiffEditor::setDocument(QSharedPointer<DiffEditorDocument> doc)
@@ -225,7 +226,7 @@ void DiffEditor::setDocument(QSharedPointer<DiffEditorDocument> doc)
     connect(m_document.data(), &DiffEditorDocument::reloadFinished,
             this, &DiffEditor::reloadHasFinished);
 
-    connect(m_reloadAction, &QAction::triggered, this, [this]() { m_document->reload(); });
+    connect(m_reloadAction, &QAction::triggered, this, [this] { m_document->reload(); });
     connect(m_document.data(), &DiffEditorDocument::temporaryStateChanged,
             this, &DiffEditor::documentStateChanged);
 
@@ -250,9 +251,9 @@ DiffEditor::~DiffEditor()
     qDeleteAll(m_views);
 }
 
-Core::IEditor *DiffEditor::duplicate()
+IEditor *DiffEditor::duplicate()
 {
-    auto editor = new DiffEditor();
+    auto editor = new DiffEditor;
     Utils::GuardLocker guard(editor->m_ignoreChanges);
 
     editor->setDocument(m_document);
@@ -270,7 +271,7 @@ Core::IEditor *DiffEditor::duplicate()
     return editor;
 }
 
-Core::IDocument *DiffEditor::document() const
+IDocument *DiffEditor::document() const
 {
     return m_document.data();
 }
@@ -421,7 +422,7 @@ void DiffEditor::prepareForReload()
                 = qMakePair(m_entriesComboBox->itemData(m_currentDiffFileIndex, Qt::UserRole).toString(),
                             m_entriesComboBox->itemData(m_currentDiffFileIndex, Qt::UserRole + 1).toString());
     } else {
-        m_currentFileChunk = qMakePair(QString(), QString());
+        m_currentFileChunk = {};
     }
 
     {
@@ -457,7 +458,7 @@ void DiffEditor::reloadHasFinished(bool success)
         }
     }
 
-    m_currentFileChunk = qMakePair(QString(), QString());
+    m_currentFileChunk = {};
     if (index >= 0)
         setCurrentDiffFileIndex(index);
 }
@@ -519,7 +520,7 @@ void DiffEditor::toggleSync()
 IDiffView *DiffEditor::loadSettings()
 {
     QTC_ASSERT(currentView(), return nullptr);
-    QSettings *s = Core::ICore::settings();
+    QSettings *s = ICore::settings();
 
     // Read current settings:
     s->beginGroup(settingsGroupC);
@@ -539,7 +540,7 @@ IDiffView *DiffEditor::loadSettings()
 
 void DiffEditor::saveSetting(const QString &key, const QVariant &value) const
 {
-    QSettings *s = Core::ICore::settings();
+    QSettings *s = ICore::settings();
     s->beginGroup(settingsGroupC);
     s->setValue(key, value);
     s->endGroup();
diff --git a/src/plugins/diffeditor/diffeditorcontroller.cpp b/src/plugins/diffeditor/diffeditorcontroller.cpp
index 130b938eff5..c3432bc2c6b 100644
--- a/src/plugins/diffeditor/diffeditorcontroller.cpp
+++ b/src/plugins/diffeditor/diffeditorcontroller.cpp
@@ -63,7 +63,7 @@ Core::IDocument *DiffEditorController::findOrCreateDocument(const QString &vcsId
 {
     QString preferredDisplayName = displayName;
     Core::IEditor *editor = Core::EditorManager::openEditorWithContents(
-                Constants::DIFF_EDITOR_ID, &preferredDisplayName, QByteArray(), vcsId);
+                Constants::DIFF_EDITOR_ID, &preferredDisplayName, {}, vcsId);
     return editor ? editor->document() : nullptr;
 }
 
diff --git a/src/plugins/diffeditor/diffeditorcontroller.h b/src/plugins/diffeditor/diffeditorcontroller.h
index d89e854d412..f5654c6c09c 100644
--- a/src/plugins/diffeditor/diffeditorcontroller.h
+++ b/src/plugins/diffeditor/diffeditorcontroller.h
@@ -63,7 +63,7 @@ protected:
 
     void setDiffFiles(const QList<FileData> &diffFileList,
                       const Utils::FilePath &baseDirectory = {},
-                      const QString &startupFile = QString());
+                      const QString &startupFile = {});
     void setDescription(const QString &description);
     QString description() const;
     void forceContextLineCount(int lines);
diff --git a/src/plugins/diffeditor/diffeditordocument.cpp b/src/plugins/diffeditor/diffeditordocument.cpp
index 09b18b4ab6e..19f1f01bb1b 100644
--- a/src/plugins/diffeditor/diffeditordocument.cpp
+++ b/src/plugins/diffeditor/diffeditordocument.cpp
@@ -120,15 +120,12 @@ QString DiffEditorDocument::makePatch(int fileIndex, int chunkIndex,
                                       bool revert, bool addPrefix,
                                       const QString &overriddenFileName) const
 {
-    if (fileIndex < 0 || chunkIndex < 0)
-        return QString();
-
-    if (fileIndex >= m_diffFiles.count())
-        return QString();
+    if (fileIndex < 0 || chunkIndex < 0 || fileIndex >= m_diffFiles.count())
+        return {};
 
     const FileData &fileData = m_diffFiles.at(fileIndex);
     if (chunkIndex >= fileData.chunks.count())
-        return QString();
+        return {};
 
     const ChunkData chunkData = filterChunk(fileData.chunks.at(chunkIndex), selection, revert);
     const bool lastChunk = (chunkIndex == fileData.chunks.count() - 1);
@@ -257,12 +254,12 @@ bool DiffEditorDocument::save(QString *errorString, const FilePath &filePath, bo
         return false;
 
     setController(nullptr);
-    setDescription(QString());
+    setDescription({});
     Core::EditorManager::clearUniqueId(this);
 
     setTemporary(false);
     setFilePath(filePath.absoluteFilePath());
-    setPreferredDisplayName(QString());
+    setPreferredDisplayName({});
     emit temporaryStateChanged();
 
     return true;
@@ -393,8 +390,8 @@ void DiffEditorDocument::beginReload()
     m_state = Reloading;
     emit changed();
     QSignalBlocker blocker(this);
-    setDiffFiles(QList<FileData>(), {});
-    setDescription(QString());
+    setDiffFiles({}, {});
+    setDescription({});
 }
 
 void DiffEditorDocument::endReload(bool success)
diff --git a/src/plugins/diffeditor/diffeditordocument.h b/src/plugins/diffeditor/diffeditordocument.h
index 5a329ea99a0..8a22801092d 100644
--- a/src/plugins/diffeditor/diffeditordocument.h
+++ b/src/plugins/diffeditor/diffeditordocument.h
@@ -35,10 +35,10 @@ public:
                                  const ChunkSelection &selection, bool revert);
     QString makePatch(int fileIndex, int chunkIndex, const ChunkSelection &selection,
                       bool revert, bool addPrefix = false,
-                      const QString &overriddenFileName = QString()) const;
+                      const QString &overriddenFileName = {}) const;
 
     void setDiffFiles(const QList<FileData> &data, const Utils::FilePath &directory,
-                      const QString &startupFile = QString());
+                      const QString &startupFile = {});
     QList<FileData> diffFiles() const;
     Utils::FilePath baseDirectory() const;
     void setBaseDirectory(const Utils::FilePath &directory);
diff --git a/src/plugins/diffeditor/diffeditorplugin.cpp b/src/plugins/diffeditor/diffeditorplugin.cpp
index 5a6a3ee224e..c84b8a9133e 100644
--- a/src/plugins/diffeditor/diffeditorplugin.cpp
+++ b/src/plugins/diffeditor/diffeditorplugin.cpp
@@ -146,7 +146,7 @@ void DiffFilesController::cancelReload()
 {
     if (m_futureWatcher.future().isRunning()) {
         m_futureWatcher.future().cancel();
-        m_futureWatcher.setFuture(QFuture<FileData>());
+        m_futureWatcher.setFuture({});
     }
 }
 
@@ -850,7 +850,7 @@ void DiffEditor::Internal::DiffEditorPlugin::testMakePatch()
 void DiffEditor::Internal::DiffEditorPlugin::testReadPatch_data()
 {
     QTest::addColumn<QString>("sourcePatch");
-    QTest::addColumn<QList<FileData> >("fileDataList");
+    QTest::addColumn<QList<FileData>>("fileDataList");
 
     QString patch = "diff --git a/src/plugins/diffeditor/diffeditor.cpp b/src/plugins/diffeditor/diffeditor.cpp\n"
                     "index eab9e9b..082c135 100644\n"
@@ -1189,11 +1189,11 @@ void DiffEditor::Internal::DiffEditorPlugin::testReadPatch_data()
             " \n"
             ;
 
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("src/plugins/texteditor/basetextdocument.h"),
                           DiffFileInfo("src/plugins/texteditor/textdocument.h")};
     fileData1.fileOperation = FileData::RenameFile;
-    fileData2 = FileData();
+    fileData2 = {};
     fileData2.fileInfo = {DiffFileInfo("src/plugins/texteditor/basetextdocumentlayout.cpp", "0121933"),
                           DiffFileInfo("src/plugins/texteditor/textdocumentlayout.cpp", "01cc3a0")};
     fileData2.fileOperation = FileData::RenameFile;
@@ -1224,7 +1224,7 @@ void DiffEditor::Internal::DiffEditorPlugin::testReadPatch_data()
             "-Subproject commit eda76354077a427d692fee05479910de31040d3f\n"
             "+Subproject commit eda76354077a427d692fee05479910de31040d3f-dirty\n"
             ;
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("src/shared/qbs"), DiffFileInfo("src/shared/qbs")};
     chunkData1.startingLineNumber = {0, 0};
     rows1.clear();
@@ -1257,23 +1257,23 @@ void DiffEditor::Internal::DiffEditorPlugin::testReadPatch_data()
             "Binary files /dev/null and b/demos/arthurplugin/flower.jpg differ\n"
             ;
 
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("demos/arthurplugin/arthurplugin.pro", "0000000"),
                           DiffFileInfo("demos/arthurplugin/arthurplugin.pro", "c5132b4")};
     fileData1.fileOperation = FileData::NewFile;
-    chunkData1 = ChunkData();
+    chunkData1 = {};
     chunkData1.startingLineNumber = {-1, 0};
     rows1.clear();
     rows1 << RowData(TextLineData::Separator, _("XXX"));
     rows1 << RowData(TextLineData::Separator, TextLineData(TextLineData::TextLine));
     chunkData1.rows = rows1;
     fileData1.chunks << chunkData1;
-    fileData2 = FileData();
+    fileData2 = {};
     fileData2.fileInfo = {DiffFileInfo("demos/arthurplugin/bg1.jpg", "0000000"),
                           DiffFileInfo("demos/arthurplugin/bg1.jpg", "dfc7cee")};
     fileData2.fileOperation = FileData::NewFile;
     fileData2.binaryFiles = true;
-    fileData3 = FileData();
+    fileData3 = {};
     fileData3.fileInfo = {DiffFileInfo("demos/arthurplugin/flower.jpg", "0000000"),
                           DiffFileInfo("demos/arthurplugin/flower.jpg", "f8e022c")};
     fileData3.fileOperation = FileData::NewFile;
@@ -1291,7 +1291,7 @@ void DiffEditor::Internal::DiffEditorPlugin::testReadPatch_data()
             "new mode 100755\n"
             ;
 
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("script.sh"), DiffFileInfo("script.sh")};
     fileData1.fileOperation = FileData::ChangeMode;
 
@@ -1310,7 +1310,7 @@ rename to new.sh
 )"
             ;
 
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("old.sh"), DiffFileInfo("new.sh")};
     fileData1.fileOperation = FileData::RenameFile;
 
@@ -1327,10 +1327,10 @@ rename to new.sh
             "--- src/plugins/subversion/subversioneditor.cpp\t(revision 0)\n"
             "+++ src/plugins/subversion/subversioneditor.cpp\t(revision 0)\n"
             "@@ -0,0 +125 @@\n\n";
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("src/plugins/subversion/subversioneditor.cpp"),
                           DiffFileInfo("src/plugins/subversion/subversioneditor.cpp")};
-    chunkData1 = ChunkData();
+    chunkData1 = {};
     chunkData1.startingLineNumber = {-1, 124};
     fileData1.chunks << chunkData1;
     QList<FileData> fileDataList21;
@@ -1346,10 +1346,10 @@ rename to new.sh
             "--- src/plugins/subversion/subversioneditor.cpp\t(revision 42)\n"
             "+++ src/plugins/subversion/subversioneditor.cpp\t(working copy)\n"
             "@@ -1,125 +0,0 @@\n\n";
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("src/plugins/subversion/subversioneditor.cpp"),
                           DiffFileInfo("src/plugins/subversion/subversioneditor.cpp")};
-    chunkData1 = ChunkData();
+    chunkData1 = {};
     chunkData1.startingLineNumber = {0, -1};
     fileData1.chunks << chunkData1;
     QList<FileData> fileDataList22;
@@ -1365,10 +1365,10 @@ rename to new.sh
             "--- src/plugins/subversion/subversioneditor.cpp\t(revision 42)\n"
             "+++ src/plugins/subversion/subversioneditor.cpp\t(working copy)\n"
             "@@ -120,7 +120,7 @@\n\n";
-    fileData1 = FileData();
+    fileData1 = {};
     fileData1.fileInfo = {DiffFileInfo("src/plugins/subversion/subversioneditor.cpp"),
                           DiffFileInfo("src/plugins/subversion/subversioneditor.cpp")};
-    chunkData1 = ChunkData();
+    chunkData1 = {};
     chunkData1.startingLineNumber = {119, 119};
     fileData1.chunks << chunkData1;
     QList<FileData> fileDataList23;
@@ -1425,7 +1425,7 @@ void DiffEditor::Internal::DiffEditorPlugin::testFilterPatch_data()
     QTest::addColumn<ChunkSelection>("selection");
     QTest::addColumn<bool>("revert");
 
-    auto createChunk = []() {
+    auto createChunk = [] {
         ChunkData chunk;
         chunk.contextInfo = "void DiffEditor::ctor()";
         chunk.contextChunk = false;
diff --git a/src/plugins/diffeditor/diffeditorwidgetcontroller.cpp b/src/plugins/diffeditor/diffeditorwidgetcontroller.cpp
index 9c636fa33dc..b32ad7f00db 100644
--- a/src/plugins/diffeditor/diffeditorwidgetcontroller.cpp
+++ b/src/plugins/diffeditor/diffeditorwidgetcontroller.cpp
@@ -164,7 +164,7 @@ void DiffEditorWidgetController::patch(bool revert, int fileIndex, int chunkInde
     if (patchBehaviour == DiffFileInfo::PatchFile) {
         const int strip = m_document->baseDirectory().isEmpty() ? -1 : 0;
 
-        const QString patch = m_document->makePatch(fileIndex, chunkIndex, ChunkSelection(), revert);
+        const QString patch = m_document->makePatch(fileIndex, chunkIndex, {}, revert);
 
         if (patch.isEmpty())
             return;
@@ -190,7 +190,7 @@ void DiffEditorWidgetController::patch(bool revert, int fileIndex, int chunkInde
         const QString contentsCopyDir = QFileInfo(contentsCopyFileName).absolutePath();
 
         const QString patch = m_document->makePatch(fileIndex, chunkIndex,
-                                                    ChunkSelection(), revert, false,
+                                                    {}, revert, false,
                                                     QFileInfo(contentsCopyFileName).fileName());
 
         if (patch.isEmpty())
@@ -251,18 +251,12 @@ bool DiffEditorWidgetController::chunkExists(int fileIndex, int chunkIndex) cons
 
 ChunkData DiffEditorWidgetController::chunkData(int fileIndex, int chunkIndex) const
 {
-    if (!m_document)
-        return ChunkData();
-
-    if (fileIndex < 0 || chunkIndex < 0)
-        return ChunkData();
-
-    if (fileIndex >= m_contextFileData.count())
-        return ChunkData();
+    if (!m_document || fileIndex < 0 || chunkIndex < 0 || fileIndex >= m_contextFileData.count())
+        return {};
 
     const FileData fileData = m_contextFileData.at(fileIndex);
     if (chunkIndex >= fileData.chunks.count())
-        return ChunkData();
+        return {};
 
     return fileData.chunks.at(chunkIndex);
 }
@@ -328,8 +322,7 @@ void DiffEditorWidgetController::sendChunkToCodePaster(int fileIndex, int chunkI
     auto pasteService = ExtensionSystem::PluginManager::getObject<CodePaster::Service>();
     QTC_ASSERT(pasteService, return);
 
-    const QString patch = m_document->makePatch(fileIndex, chunkIndex,
-                                                ChunkSelection(), false);
+    const QString patch = m_document->makePatch(fileIndex, chunkIndex, {}, false);
 
     if (patch.isEmpty())
         return;
diff --git a/src/plugins/diffeditor/diffutils.cpp b/src/plugins/diffeditor/diffutils.cpp
index 1ed23fe3ad5..a0fea233382 100644
--- a/src/plugins/diffeditor/diffutils.cpp
+++ b/src/plugins/diffeditor/diffutils.cpp
@@ -38,12 +38,8 @@ static QList<TextLineData> assemblyRows(const QList<TextLineData> &lines,
 static bool lastLinesEqual(const QList<TextLineData> &leftLines,
                            const QList<TextLineData> &rightLines)
 {
-    const bool leftLineEqual = !leftLines.isEmpty()
-            ? leftLines.last().text.isEmpty()
-            : true;
-    const bool rightLineEqual = !rightLines.isEmpty()
-            ? rightLines.last().text.isEmpty()
-            : true;
+    const bool leftLineEqual = leftLines.isEmpty() || leftLines.last().text.isEmpty();
+    const bool rightLineEqual = rightLines.isEmpty() || rightLines.last().text.isEmpty();
     return leftLineEqual && rightLineEqual;
 }
 
@@ -207,10 +203,8 @@ ChunkData DiffUtils::calculateOriginalData(const QList<Diff> &leftDiffList,
         }
     }
 
-    QList<TextLineData> leftData = assemblyRows(leftLines,
-                                                leftSpans);
-    QList<TextLineData> rightData = assemblyRows(rightLines,
-                                                 rightSpans);
+    QList<TextLineData> leftData = assemblyRows(leftLines, leftSpans);
+    QList<TextLineData> rightData = assemblyRows(rightLines, rightSpans);
 
     // fill ending separators
     for (int i = leftData.size(); i < rightData.size(); i++)
@@ -334,7 +328,7 @@ QString DiffUtils::makePatch(const ChunkData &chunkData,
                              bool lastChunk)
 {
     if (chunkData.contextChunk)
-        return QString();
+        return {};
 
     QString diffText;
     int leftLineCount = 0;
@@ -623,7 +617,7 @@ static QList<RowData> readLines(QStringView patch, bool lastChunk, bool *lastChu
         || (noNewLineInInsert >= 0 && (noNewLineInInsert != lastInsert || lastEqual > lastInsert))) {
         if (ok)
             *ok = false;
-        return QList<RowData>();
+        return {};
     }
 
     if (ok)
@@ -712,7 +706,7 @@ static QStringView readLine(QStringView text, QStringView *remainingText, bool *
     const int indexOfFirstNewLine = text.indexOf(newLine);
     if (indexOfFirstNewLine < 0) {
         if (remainingText)
-            *remainingText = QStringView();
+            *remainingText = {};
         if (hasNewLine)
             *hasNewLine = false;
         return text;
@@ -880,7 +874,7 @@ static FileData readDiffHeaderAndChunks(QStringView headerAndChunks, bool *ok)
         *ok = readOk;
 
     if (!readOk)
-        return FileData();
+        return {};
 
     return fileData;
 
@@ -914,7 +908,7 @@ static QList<FileData> readDiffPatch(QStringView patch, bool *ok, QFutureInterfa
         int lastPos = -1;
         do {
             if (jobController && jobController->isCanceled())
-                return QList<FileData>();
+                return {};
 
             int pos = diffMatch.capturedStart();
             if (lastPos >= 0) {
@@ -948,7 +942,7 @@ static QList<FileData> readDiffPatch(QStringView patch, bool *ok, QFutureInterfa
         *ok = readOk;
 
     if (!readOk)
-        return QList<FileData>();
+        return {};
 
     return fileDataList;
 }
@@ -1044,7 +1038,7 @@ static bool detectIndexAndBinary(QStringView patch, FileData *fileData, QStringV
 
     if (*remainingPatch == binaryLine) {
         fileData->binaryFiles = true;
-        *remainingPatch = QStringView();
+        *remainingPatch = {};
         return true;
     }
 
@@ -1225,7 +1219,7 @@ static QList<FileData> readGitPatch(QStringView patch, bool *ok, QFutureInterfac
     const int count = startingPositions.size();
     for (int i = 0; i < count; i++) {
         if (jobController && jobController->isCanceled())
-            return QList<FileData>();
+            return {};
 
         const int diffStart = startingPositions.at(i);
         const int diffEnd = (i < count - 1)
@@ -1251,7 +1245,7 @@ static QList<FileData> readGitPatch(QStringView patch, bool *ok, QFutureInterfac
     if (!readOk) {
         if (ok)
             *ok = readOk;
-        return QList<FileData>();
+        return {};
     }
 
     if (jobController)
@@ -1263,7 +1257,7 @@ static QList<FileData> readGitPatch(QStringView patch, bool *ok, QFutureInterfac
     for (const auto &patchInfo : qAsConst(patches)) {
         if (jobController) {
             if (jobController->isCanceled())
-                return QList<FileData>();
+                return {};
             jobController->setProgressValue(i++);
         }
 
@@ -1283,7 +1277,7 @@ static QList<FileData> readGitPatch(QStringView patch, bool *ok, QFutureInterfac
         *ok = readOk;
 
     if (!readOk)
-        return QList<FileData>();
+        return {};
 
     return fileDataList;
 }
diff --git a/src/plugins/diffeditor/selectabletexteditorwidget.cpp b/src/plugins/diffeditor/selectabletexteditorwidget.cpp
index 5f51afa934f..b078b023195 100644
--- a/src/plugins/diffeditor/selectabletexteditorwidget.cpp
+++ b/src/plugins/diffeditor/selectabletexteditorwidget.cpp
@@ -31,11 +31,11 @@ static QList<DiffSelection> subtractSelection(
 {
     // tha case that whole minuend is before the whole subtrahend
     if (minuendSelection.end >= 0 && minuendSelection.end <= subtrahendSelection.start)
-        return QList<DiffSelection>() << minuendSelection;
+        return {minuendSelection};
 
     // the case that whole subtrahend is before the whole minuend
     if (subtrahendSelection.end >= 0 && subtrahendSelection.end <= minuendSelection.start)
-        return QList<DiffSelection>() << minuendSelection;
+        return {minuendSelection};
 
     bool makeMinuendSubtrahendStart = false;
     bool makeSubtrahendMinuendEnd = false;
diff --git a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
index a9d0a3cb34b..076f14e2dbe 100644
--- a/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
+++ b/src/plugins/diffeditor/sidebysidediffeditorwidget.cpp
@@ -39,7 +39,6 @@ public:
     SideDiffEditorWidget(QWidget *parent = nullptr);
 
     void clearAll(const QString &message);
-    void clearAllData();
     void saveState();
     using TextEditor::TextEditorWidget::restoreState;
     void restoreState();
@@ -193,7 +192,7 @@ QString SideDiffEditorWidget::lineNumber(int blockNumber) const
     const auto it = m_data.m_lineNumbers.constFind(blockNumber);
     if (it != m_data.m_lineNumbers.constEnd())
         return QString::number(it.value());
-    return QString();
+    return {};
 }
 
 int SideDiffEditorWidget::lineNumberDigits() const
@@ -223,7 +222,7 @@ QString SideDiffEditorWidget::plainTextFromSelection(const QTextCursor &cursor)
     const int startPosition = cursor.selectionStart();
     const int endPosition = cursor.selectionEnd();
     if (startPosition == endPosition)
-        return QString(); // no selection
+        return {}; // no selection
 
     const QTextBlock startBlock = document()->findBlock(startPosition);
     const QTextBlock endBlock = document()->findBlock(endPosition);
@@ -344,16 +343,10 @@ int SideDiffData::chunkRowsCountForBlockNumber(int blockNumber) const
 void SideDiffEditorWidget::clearAll(const QString &message)
 {
     clear();
-    clearAllData();
-    setExtraSelections(TextEditorWidget::OtherSelection,
-                       QList<QTextEdit::ExtraSelection>());
-    setPlainText(message);
-}
-
-void SideDiffEditorWidget::clearAllData()
-{
     m_data = {};
     setSelections({});
+    setExtraSelections(TextEditorWidget::OtherSelection, {});
+    setPlainText(message);
 }
 
 void SideDiffEditorWidget::scrollContentsBy(int dx, int dy)
@@ -544,7 +537,7 @@ void SideDiffEditorWidget::paintEvent(QPaintEvent *e)
                                       m_drawCollapsedOffset,
                                       m_drawCollapsedClip);
         // reset the data for the drawing
-        m_drawCollapsedBlock = QTextBlock();
+        m_drawCollapsedBlock = {};
     }
 }
 
@@ -565,8 +558,8 @@ void SideDiffEditorWidget::customDrawCollapsedBlockPopup(QPainter &painter,
             QRectF r = blockBoundingRect(b).translated(offset);
 
             QTextLayout *layout = b.layout();
-            for (int i = layout->lineCount()-1; i >= 0; --i)
-                maxWidth = qMax(maxWidth, layout->lineAt(i).naturalTextWidth() + 2*margin);
+            for (int i = layout->lineCount() - 1; i >= 0; --i)
+                maxWidth = qMax(maxWidth, layout->lineAt(i).naturalTextWidth() + 2 * margin);
 
             blockHeight += r.height();
 
@@ -585,9 +578,8 @@ void SideDiffEditorWidget::customDrawCollapsedBlockPopup(QPainter &painter,
     if (ifdefedOutFormat.hasProperty(QTextFormat::BackgroundBrush))
         brush = ifdefedOutFormat.background();
     painter.setBrush(brush);
-    painter.drawRoundedRect(QRectF(offset.x(),
-                                   offset.y(),
-                                   maxWidth, blockHeight).adjusted(0, 0, 0, 0), 3, 3);
+    painter.drawRoundedRect(QRectF(offset.x(), offset.y(), maxWidth, blockHeight)
+                            .adjusted(0, 0, 0, 0), 3, 3);
     painter.restore();
 
     QTextBlock end = b;
@@ -782,7 +774,7 @@ DiffEditorDocument *SideBySideDiffEditorWidget::diffDocument() const
 void SideBySideDiffEditorWidget::clear(const QString &message)
 {
     const GuardLocker locker(m_controller.m_ignoreChanges);
-    setDiff(QList<FileData>());
+    setDiff({});
     m_leftEditor->clearAll(message);
     m_rightEditor->clearAll(message);
 }
diff --git a/src/plugins/diffeditor/sidebysidediffeditorwidget.h b/src/plugins/diffeditor/sidebysidediffeditorwidget.h
index cc16d825e8e..d025973e088 100644
--- a/src/plugins/diffeditor/sidebysidediffeditorwidget.h
+++ b/src/plugins/diffeditor/sidebysidediffeditorwidget.h
@@ -47,7 +47,7 @@ public:
 
     void setLineNumber(int blockNumber, int lineNumber);
     void setFileInfo(int blockNumber, const DiffFileInfo &fileInfo);
-    void setSkippedLines(int blockNumber, int skippedLines, const QString &contextInfo = QString()) {
+    void setSkippedLines(int blockNumber, int skippedLines, const QString &contextInfo = {}) {
         m_skippedLines[blockNumber] = qMakePair(skippedLines, contextInfo);
         setSeparator(blockNumber, true);
     }
@@ -89,7 +89,7 @@ public:
     void saveState();
     void restoreState();
 
-    void clear(const QString &message = QString());
+    void clear(const QString &message = {});
 
 signals:
     void currentDiffFileIndexChanged(int index);
diff --git a/src/plugins/diffeditor/unifieddiffeditorwidget.cpp b/src/plugins/diffeditor/unifieddiffeditorwidget.cpp
index 46610433930..745621f3b2d 100644
--- a/src/plugins/diffeditor/unifieddiffeditorwidget.cpp
+++ b/src/plugins/diffeditor/unifieddiffeditorwidget.cpp
@@ -304,7 +304,7 @@ QString UnifiedDiffData::setChunk(const DiffEditorInput &input, const ChunkData
                                   DiffSelections *selections)
 {
     if (chunkData.contextChunk)
-        return QString();
+        return {};
 
     QString diffText;
     int leftLineCount = 0;
@@ -341,8 +341,7 @@ QString UnifiedDiffData::setChunk(const DiffEditorInput &input, const ChunkData
                                 '-',
                                 lineData.text,
                                 lastChunk,
-                                i == chunkData.rows.count()
-                                && j == leftBuffer.count() - 1);
+                                i == chunkData.rows.count() && j == leftBuffer.count() - 1);
 
                     const int blockDelta = line.count('\n'); // no new line
                                                      // could have been added
@@ -351,10 +350,8 @@ QString UnifiedDiffData::setChunk(const DiffEditorInput &input, const ChunkData
 
                     for (auto it = lineData.changedPositions.cbegin(),
                               end = lineData.changedPositions.cend(); it != end; ++it) {
-                        const int startPos = it.key() < 0
-                                ? 1 : it.key() + 1;
-                        const int endPos = it.value() < 0
-                                ? it.value() : it.value() + 1;
+                        const int startPos = it.key() < 0 ? 1 : it.key() + 1;
+                        const int endPos = it.value() < 0 ? it.value() : it.value() + 1;
                         (*selections)[*blockNumber + blockCount + 1].append(
                                     DiffSelection(startPos, endPos, input.m_leftCharFormat));
                     }
@@ -382,8 +379,7 @@ QString UnifiedDiffData::setChunk(const DiffEditorInput &input, const ChunkData
                                 '+',
                                 lineData.text,
                                 lastChunk,
-                                i == chunkData.rows.count()
-                                && j == rightBuffer.count() - 1);
+                                i == chunkData.rows.count() && j == rightBuffer.count() - 1);
 
                     const int blockDelta = line.count('\n'); // no new line
                                                      // could have been added
@@ -393,10 +389,8 @@ QString UnifiedDiffData::setChunk(const DiffEditorInput &input, const ChunkData
 
                     for (auto it = lineData.changedPositions.cbegin(),
                               end = lineData.changedPositions.cend(); it != end; ++it) {
-                        const int startPos = it.key() < 0
-                                ? 1 : it.key() + 1;
-                        const int endPos = it.value() < 0
-                                ? it.value() : it.value() + 1;
+                        const int startPos = it.key() < 0 ? 1 : it.key() + 1;
+                        const int endPos = it.value() < 0 ? it.value() : it.value() + 1;
                         (*selections)[*blockNumber + blockCount + 1].append
                                 (DiffSelection(startPos, endPos, input.m_rightCharFormat));
                     }
diff --git a/src/plugins/diffeditor/unifieddiffeditorwidget.h b/src/plugins/diffeditor/unifieddiffeditorwidget.h
index d525e0348e3..bbe5790db3d 100644
--- a/src/plugins/diffeditor/unifieddiffeditorwidget.h
+++ b/src/plugins/diffeditor/unifieddiffeditorwidget.h
@@ -79,7 +79,7 @@ public:
     using TextEditor::TextEditorWidget::restoreState;
     void restoreState();
 
-    void clear(const QString &message = QString());
+    void clear(const QString &message = {});
     void setDisplaySettings(const TextEditor::DisplaySettings &ds) override;
 
 signals: