Re: [PATCH v7 0/2] diff-files: integrate with sparse index

> Changes since v6:
>
> 1. Fix word wrap in commit message.
>
> 2. Use  'mkdir -p folder1' since full-checkout already have folder1.
>
> 3. Use `--stat` to ignore file creation time differences in unrefreshed
> index.
>
> 4. In 'diff-files with pathspec outside sparse definition' add 
> 'git diff-files "folder*/a" to show that the result is the same with a 
> wildcard pathspec.
>
> 5. Create an 'ensure_expanded' to handle silent failures.