xCode FileMerge - "Line ending differ"

When I open the 2 files as left & right in FileMerge, I can see the things like the following screenshot.

As you can see, it doesn't show contents of the right file.

Before I saw th开发者_StackOverflow社区is error, I did these things : Picked some difference things and chose "Choose left" and then Merged the two files.

After I did the things, I could see the error.

I want to know why and resolution.

Thanks.

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If you look at the bottom of your screenshot, it says "Line endings differ - left: Unix (LF), right: none"

My guess is you have to correct the line endings on your "2" file.