Re: Bug report: Undocumented interaction of --exit-code and --ignore-space-change for file move

> I noticed that there an undocumented interaction of the --exit-code
> and --ignore-space-change flags to git diff, when the diff only
> contains file moves. Specifically, --ignore-space-change will cause
> git diff to return a zero exit code in this situation.
>
> I am not sure if the problem is with the command behavior, or with
> the documentation.
>
> STEPS TO REPRODUCE:
>
> git init
> echo foo > a.txt
> git add a.txt
> git commit -m "A"
> git mv a.txt b.txt
> git commit -m "B"
> git diff --exit-code HEAD~1..HEAD # returns exit code 1
> git diff --exit-code --ignore-space-change HEAD~1..HEAD # returns exit status 0
>
> EXPECTED BEHAVIOR:
>
> Both of the last two commands above should return nonzero exit status.
>
> WORKAROUND:
>
> As one might expect --no-renames undoes this behavior, although it
> also changes the diff output if not using --quiet:
>
> git diff --exit-code --ignore-space-change --no-renames HEAD~1..HEAD # returns exit status 1
>
> OTHER INFO:
>
> Tested this on git 2.39.2 and git 2.41.0, both on Linux.