public String toString() {
            return String.format(Locale.US, "%d.%d.%d.%d", m, n, p, r);
        }
transfer character stream of HWPTAG_PARA_TEXT to STRING

@param reader
@param datasize
@param buf
@throws IOException
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-miscoffice-module/src/main/java/org/apache/tika/parser/hwp/HwpTextExtractorV5.java