Hundreds of mourners joined an outdoor prayer service in Solingen on Saturday evening, less than a day after a knife-wielding attacker killed three people and injured eight more at a civic celebration in the western German city. Many came with flowers and candles to the service. People had laid down club scarves, cuddly toys, letters and other messages of solidarity at the site of the attack. “The city is a different place today than it was yesterday,” said Michael Mohr, a Catholic priest who serves as deacon for the city. Ilka Werner, a leader of the local Protestant Christian church in Solin…