Manchester City boss went from dressing like an overgrown schoolboy to relaxing the unwritten manager dress codeIn 2016, when Pep Guardiola took his place in the dugout for his first game in charge of Manchester City, the fashion plates in the Premier League included José Mourinho, in a quarter zip and mac at Manchester United and Arsène Wenger, dapper in his suit and unzippable puffer jacket at Arsenal.Guardiola, dr