bug#65049: Minor update to the repro steps

[Juri Linkov]

>> > Yes, but where did the file git-patchyYAcN5 come from in the first
>> > place?  It's that file that is the problem, not how we apply the
>> > diffs in that file.
>>
>> It's created in 'vc-git-checkin':
>>
>>         (let ((patch-file (make-nearby-temp-file "git-patch")))
>>           (with-temp-file patch-file
>>             (insert vc-git-patch-string))
>>           (unwind-protect
>>               (vc-git-command nil 0 patch-file "apply" "--cached")
>
> Then this should set up EOL conversion correctly for the temporary
> file.  Something like (untested):
>
>         (let ((patch-file (make-nearby-temp-file "git-patch")))
>           (with-temp-file patch-file
>             (insert vc-git-patch-string)
>             (set-buffer-file-coding-system 'unix)))
>           (unwind-protect
>               (vc-git-command nil 0 patch-file "apply" "--cached")

Sorry, I can't test this on Windows.