Editor: Rename format -> autoIndent

Renaming the auto indent function triggered by Ctrl+I to make room
for a real format action.

Change-Id: If5731353311030d66a20f1093a7fdd300703ebbc
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/texteditor/texteditor.cpp

@@ -7058,7 +7058,7 @@ void TextEditorWidget::setIfdefedOutBlocks(const QList<BlockRange> &blocks)
         documentLayout->requestUpdate();
 }
 
-void TextEditorWidget::format()
+void TextEditorWidget::autoIndent()
 {
     QTextCursor cursor = textCursor();
     cursor.beginEditBlock();