Bug 23316 preference to turn off automagic-closing-brackets
there should be a way to turn it off - i'm not used to it and it gets in my way a bit
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
private void startTabConversion() {
		if (fTabConverter == null) {
			fTabConverter= new TabConverter();
			configureTabConverter();
			fTabConverter.setNumberOfSpacesPerTab(getTabSize());
			AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();
			asv.addTextConverter(fTabConverter);
			
			asv.updateIndentationPrefixes();
		}
	}
	
	private void stopTabConversion() {
		if (fTabConverter != null) {
			AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();
			asv.removeTextConverter(fTabConverter);
			
			asv.updateIndentationPrefixes();
			fTabConverter= null;
		}
	}
	
	private boolean isTabConversionEnabled() {
		IPreferenceStore store= getPreferenceStore();
		return store.getBoolean(SPACES_FOR_TABS);
	}
	
	private void showOverviewRuler() {
		AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();