Danielle Outlaw, who took over Monday as Philadelphia’s new police commissioner, said the nail polish she wore this week had been among the last things on her mind on her first day on the job. But while making the rounds and introducing herself to the troops, Outlaw said, people kept pointing out that her black nail polish technically violated the department’s directives on appearance. So in one of her first official actions as top cop, Outlaw changed the rule to allow for more stylish nails. And during an interview Wednesday, one of her first since taking over, Outlaw — the...