为什么第三个`if`语句是错误的？

Question

下面，第三条if语句有错误：

./if-5.sh: line 14: syntax error: unexpected end of file

脚本为：

#!/bin/bash

if [ -r /var/spool/mail/root ];then
     echo "You can read the file."
fi


if [ -w /var/spool/mail/root ];then
     echo "You can write the file."

if [ -x /var/spool/mail/root ];then
     echo "You can execute the file."
fi

我认为第三个if语句将不会执行。