Attr attr = element.attributes.item(i)
                target.append(" $attr.name=\"$attr.value\"")
            }

            element.childNodes.findAll { it instanceof Text }.each {
                assert it.textContent != null : "Found null text element in <$element.tagName>"
            }

            List<Node> trimmedContent = element.childNodes.collect { it };

                builder.append(line);
                builder.append("\n");
            }
        } catch (IOException e) {
            throw UncheckedException.throwAsUncheckedException(e);
        }
        input.insert(pos, builder.toString().trim());
    }

    public char getFirst() {
        return input.charAt(pos);
    }