Re: [PATCH 05/14] diff: add a comment about combine_diff_path.parent.path

> We only fill in the per-parent "path" field when it differs from what's
> in combine_diff_path.path (and even then only when the option is
> appropriate). Let's document that.
> 
> Suggested-by: Wink Saville <wink@saville.com>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
>  diff.h | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/diff.h b/diff.h
> index f5f6ea00fb..60e7db4ad6 100644
> --- a/diff.h
> +++ b/diff.h
> @@ -480,6 +480,12 @@ struct combine_diff_path {
>  		char status;
>  		unsigned int mode;
>  		struct object_id oid;
> +		/*
> +		 * This per-parent path is filled only when doing a combined
> +		 * diff with revs.combined_all_paths set, and only if the path
> +		 * differs from the post-image (e.g., a rename or copy).
> +		 * Otherwise it is left NULL.
> +		 */
>  		char *path;
>  	} parent[FLEX_ARRAY];
>  };