[PATCH v2 5/5] doc/Makefile: turn warnings into errors

[Bin Meng]

On Sat, Feb 22, 2020 at 1:25 AM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
> Several patches delivered incorrect restructured text as documentation. We
> should be able to discover this in Travis CI, Gitlab CI, or Azure CI.
>
> So let us turn all build warnings into errors.
>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> ---
> v2:
>         change commit message
> ---
>  doc/Makefile | 1 +
>  1 file changed, 1 insertion(+)
>

Reviewed-by: Bin Meng <bmeng.cn at gmail.com>