string - How to store the different value between two string?

Question

For example, here is the simple text:

This is a texting sentence.

and this is the modified one:

This is a testing sentence.

As you can see the x is replaced by s, how can I store this information? Of course, I can store the whole new string, but I would like to store the diff, is there any format or standard to represent the differ of string? Thanks.

Answer 1

RCSは、ファイルの差分を保存する標準的な方法の 1 つです。