Review

class StringUtils {
    /**
     * <p>Removes <code>\n</code> from end of a String if it's there.
     * If a <code>\r</code> precedes it, then remove that too.</p>
     *
     * @param str  the String to chop a newline from, must not be null
     * @return String without newline
     * @throws NullPointerException if str is <code>null</code>
     * @deprecated Use {@link #chomp(String)} instead.
     *             Method will be removed in Commons Lang 3.0.
     */
    public static String chopNewline(String str) {
        int lastIdx = str.length() - 1;
        if (lastIdx <= 0) {
            return EMPTY;
        }
        char last = str.charAt(lastIdx);
        if (last == CharUtils.LF) {
            if (str.charAt(lastIdx - 1) == CharUtils.CR) {
                lastIdx--;
            }
        } else {
            lastIdx++;
        }
        return str.substring(0, lastIdx);
    }

}