Re: [PATCH] Fix incorrect diff of a link -> file change if core.filemode = false.

> After this sequence:
>
> $ ln -s foo A
> $ git add A
> $ git commit -m link
> $ rm A && echo bar > A
>
> the working copy contains a regular file A but HEAD contains A as a link.
>
> Normally, at this point 'git diff HEAD' displays this change as a removal
> of the link followed by an addition of a new file. But in a repository where
> core.filemode is false this is displayed as a modification of the link.
> The reason is that the check when the cached mode is allowed to override the
> file's actual mode is not strict enough.
>
> Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>