private static void append(StringBuffer buf, String str) {
		if (buf.length() > 0) {
			buf.append(" | ");
		}
		buf.append(str);
	}
returns a string representation of the given operandType
@param operandType the operandType bits
@return the string rep
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/lang/OperandType.java