Re: [PATCH] format-patch: set diffstat width to 70 instead of default 80

> Patches or cover letters generated by format-patch are meant to be
> exchanged as emails, most of the time. And since it's generally agreed
> that text in mails should be wrapped around 70 columns or so, make sure
> these diffstat follow the convention.
>
> I noticed this when I quoted a diffstat line [1]. Should we do something
> like this? diffstat is rarely quoted though so perhaps the stat width
> should be something like 75.
>
> t4052 fails but I don't think it's worth fixing until it's clear if it's
> worth doing this.

>
> [1] https://public-inbox.org/git/20180122121426.GD5980@ash/T/#u
>
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> ---
>  builtin/log.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/builtin/log.c b/builtin/log.c
> index 14fdf39165..6be79656c5 100644
> --- a/builtin/log.c
> +++ b/builtin/log.c
> @@ -1061,6 +1061,7 @@ static void make_cover_letter(struct rev_info *rev, int use_stdout,
>  
>  	memcpy(&opts, &rev->diffopt, sizeof(opts));
>  	opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
> +	opts.diffopt.stat_width = 70;
>  
>  	diff_setup_done(&opts);
>  
> @@ -1611,9 +1612,12 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
>  		die(_("--check does not make sense"));
>  
>  	if (!use_patch_format &&
> -		(!rev.diffopt.output_format ||
> -		 rev.diffopt.output_format == DIFF_FORMAT_PATCH))
> +	    (!rev.diffopt.output_format ||
> +	     rev.diffopt.output_format == DIFF_FORMAT_PATCH)) {
>  		rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_SUMMARY;
> +		if (!rev.diffopt.stat_width)
> +			rev.diffopt.stat_width = 70;
> +	}
>  
>  	/* Always generate a patch */
>  	rev.diffopt.output_format |= DIFF_FORMAT_PATCH;