be more conservative when reindenting code: only change the

actual whitespace when the indentation column changes.

Complete whitespace cleanup can still be done either automatically
on save (when configured) or when explicitely called with the
"Clean Whitespace" action from Edit/Advanced.

src/plugins/texteditor/basetextdocument.h

@@ -146,7 +146,7 @@ private:
     bool m_hasDecodingError;
     QByteArray m_decodingErrorSample;
 
-    void cleanWhitespace(QTextCursor& cursor, bool onlyInModifiedLines);
+    void cleanWhitespace(QTextCursor& cursor, bool cleanIndentation, bool inEntireDocument);
     void ensureFinalNewLine(QTextCursor& cursor);
 };