docs: public void setSpecialChars(String[][] chars) {
  		assert chars != null : AssertMessages.notNullParameter();
  		this.specialChars.clear();
  		for (final String[] pair : chars) {
  			assert pair != null;
  			assert pair.length == 2;
  			assert pair[0].length() > 0;
  			assert pair[1].length() > 0;
  			this.specialChars.put(pair[0], pair[1]);
  		}
  	}