Bug 80473 [rulers][preferences] allow disabling of range indicator on left of java editor
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
setStatusLineMessage(null);
		if (annotation != null) {
			try {
				fIsUpdatingAnnotationViews= true;
				updateAnnotationViews(annotation);
			} finally {
				fIsUpdatingAnnotationViews= false;
			}
			if (annotation instanceof IJavaAnnotation && ((IJavaAnnotation) annotation).isProblem())
				setStatusLineMessage(annotation.getText());
		}
	}
	/**
	 * Jumps to the matching bracket.
	 */
	public void gotoMatchingBracket() {
		ISourceViewer sourceViewer= getSourceViewer();
		IDocument document= sourceViewer.getDocument();
		if (document == null)
			return;
		IRegion selection= getSignedSelection(sourceViewer);
		int selectionLength= Math.abs(selection.getLength());
		if (selectionLength > 1) {
			setStatusLineErrorMessage(JavaEditorMessages.GotoMatchingBracket_error_invalidSelection);
			sourceViewer.getTextWidget().getDisplay().beep();
			return;
		}
		
		int sourceCaretOffset= selection.getOffset() + selection.getLength();
		if (isSurroundedByBrackets(document, sourceCaretOffset))