排除相同的字符串，在进行文本比较的时候，我们经常都需要对需要进行比较的两个文本进行筛选，排除掉相同的，剩下的就是不同的，这个小工具可以完成这一任务-Excluded from the same string, in the text of comparison, we need to always have to compare the two texts should be screened out of the same, and the rest is different, this gadget can accomplish this task