Add IDS_Trinary_Operator support from PropList.txt.

src/include/ucd/ucd.h

 	UCD_PROPERTY_NONCHARACTER_CODE_POINT = 0x00010000, /**< @brief Noncharacter_Code_Point */
 	UCD_PROPERTY_OTHER_GRAPHEME_EXTEND   = 0x00020000, /**< @brief Other_Grapheme_Extend */
 	UCD_PROPERTY_IDS_BINARY_OPERATOR     = 0x00040000, /**< @brief IDS_Binary_Operator */
+	UCD_PROPERTY_IDS_TRINARY_OPERATOR    = 0x00080000, /**< @brief IDS_Trinary_Operator */
 } ucd_property;
 
 /** @brief Return the properties of the specified codepoint.
 		Noncharacter_Code_Point = UCD_PROPERTY_NONCHARACTER_CODE_POINT, /**< @brief Noncharacter_Code_Point */
 		Other_Grapheme_Extend = UCD_PROPERTY_OTHER_GRAPHEME_EXTEND, /**< @brief Other_Grapheme_Extend */
 		IDS_Binary_Operator = UCD_PROPERTY_IDS_BINARY_OPERATOR, /**< @brief IDS_Binary_Operator */
+		IDS_Trinary_Operator = UCD_PROPERTY_IDS_TRINARY_OPERATOR, /**< @brief IDS_Trinary_Operator */
 	};
 
 	/** @brief Return the properties of the specified codepoint.

src/proplist.c

 		break;
 	case 0x2F00:
 		if (c >= 0x2FF0 && c <= 0x2FF1) return UCD_PROPERTY_IDS_BINARY_OPERATOR;
+		if (c >= 0x2FF2 && c <= 0x2FF3) return UCD_PROPERTY_IDS_TRINARY_OPERATOR;
 		if (c >= 0x2FF4 && c <= 0x2FFB) return UCD_PROPERTY_IDS_BINARY_OPERATOR;
 		break;
 	case 0x01F100:

tools/printdata.py

 	props += (2 ** 16) * data.get('Noncharacter_Code_Point', 0)
 	props += (2 ** 17) * data.get('Other_Grapheme_Extend', 0)
 	props += (2 ** 18) * data.get('IDS_Binary_Operator', 0)
+	props += (2 ** 19) * data.get('IDS_Trinary_Operator', 0)
 	return props
 
 if __name__ == '__main__':