public List<String> getTags() {
        if( tags == null ) {
            return Collections.emptyList();
        }
        return tags;
    }
Returns a string representation where all non-alphanumeric characters are replaced with an underline (_).
In addition, the result is cut-off at a length of 255 characters.

@return a string representation without special characters
jgiven-core/src/main/java/com/tngtech/jgiven/report/model/Tag.java