docs: public boolean stem(char[] wordBuffer, int offset, int wordLen) {
  		reset();
  		if (b.length < wordLen) {
  			b = new char[ArrayUtil.oversize(wordLen, NUM_BYTES_CHAR)];
  		}
  		System.arraycopy(wordBuffer, offset, b, 0, wordLen);
  		i = wordLen;
  		return stem(0);
  	}