code: 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]);
  		}
  	}
docs: Change the special characters.
  
  <p>The given table is an array of string pairs. The first element of each pair is
  the string of characters to replace. The second element of each pair is the replacement
  string of characters.
  
  @param chars the translation table.