[PATCH 5 of 9] repo: clarify 'requires feature' error further, suggest enabling the feature

[Siddharth Agarwal]

On 03/18/2014 04:33 PM, Mads Kiilerich wrote:
>               _("unknown repository format: requires features '%s' (upgrade "
> -              "Mercurial)") % "', '".join(missings),
> +              "Mercurial or enable feature)") % "', '".join(missings),

Could you turn this into a hint, please?