Comment 0 for bug 1226330

Right now when we have a time interval inside another string, we do something like this:

string delay_string = NaturalTime.instance.get_simplest_label_for_seconds (time_since_start);
string label = _("You were due to take a micro break %s ago").printf (delay_string);

Instead, we need to use ngettext so translators can provide a plural form of the wrapping string.