Have a problem with "createTwoFilesPatch" method

[lwf804]

I use jsdiff with diff2html to show diff of two strings.
Here: https://codepen.io/lwf804/pen/KYOxBL?editors=1001

I don't know why line one is changed. Can you explain for me?
Thanks!

[antonin-lebrard]

Its because there is a newline character at the end of the stringTwo:

var stringOne = "string 1",
      stringTwo = `string 1 // <= here there is a \n character that the stringOne doesn't have

b`

[ExplodingCabbage]

Correct. This matches the behaviour of the diff Unix util.

[ExplodingCabbage]

(You can preprocess your strings to ensure they always end with a trailing newline if you don't like this behaviour.)