Campaigners for Tunisia’s largest Islamist movement, Ennahda, have tended to avoid the subject of religion in the run-up to Sunday’s election. Instead, they talk about the details of their manifesto: a promise of economic growth and a strong stand against terrorism, the need for a national unity government, increased state grants for students, longer maternity leave for women working in the public sector, even the chance for expatriate Tunisians to send home a second car from abroad at a much reduced tax rate.