textArea = new RSyntaxTextArea(doc, null, 20, 60);
textArea.setCodeFoldingEnabled(true);
textArea.setAntiAliasingEnabled(true);
textArea.setText("f<-function() { \n\t42\n}");
textArea.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent ke ) {
if(ke.getKeyCode() == KeyEvent.VK_ENTER &&
ke.getModifiers() == KeyEvent.CTRL_MASK) {