DiffEditor: Make DiffEditor internal

Change-Id: Ife1d3d1efa2b89e3eccadec26d7c22cf86620911
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/diffeditor/diffeditor.cpp

@@ -70,7 +70,6 @@ static const char useDiffEditorKeyC[] = "UseDiffEditor";
 using namespace TextEditor;
 
 namespace DiffEditor {
-
 namespace Internal {
 
 class DescriptionEditorWidget : public TextEditorWidget
@@ -199,10 +198,6 @@ void DescriptionEditorWidget::handleCurrentContents()
     emit requestBranchList();
 }
 
-} // namespace Internal
-
-using namespace Internal;
-
 ///////////////////////////////// DiffEditor //////////////////////////////////
 
 DiffEditor::DiffEditor(const QSharedPointer<DiffEditorDocument> &doc)
@@ -619,6 +614,7 @@ void DiffEditor::writeCurrentDiffEditorSetting(QWidget *currentEditor)
     s->endGroup();
 }
 
+} // namespace Internal
 } // namespace DiffEditor
 
 #include "diffeditor.moc"