document.putProperty(Language.class, MarkdownTokenId.language());
document.insertString(0, " * list\n", null); // white space
String result = MarkdownDocUtil.getIndentString(document, 10);
assertEquals(" ", result);
document.insertString(0, " * list\n", null); // tab space
result = MarkdownDocUtil.getIndentString(document, 7);
assertEquals(" ", result);
document.insertString(0, " * list\n", null); // white space and tab space
result = MarkdownDocUtil.getIndentString(document, 11);