chore(accordion): clean up code style
chore(accordion): clean up code style

mabi/bootstrap,angular-ui/bootstrap,Lincoln-xzc/angular-ui-bootstrap,mabi/bootstrap,matteopic/bootstrap,matteopic/bootstrap,connyay/bootstrap,deeg/bootstrap,pdsoftplan/bootstrap,Kpler/bootstrap,Foxandxss/bootstrap,vfiles/bootstrap,wesleycho/bootstrap,Kpler/bootstrap,burlhock/bootstrap,shootermv/bootstrap,wesleycho/bootstrap,BookingBug/bootstrap,BookingBug/bootstrap,Servoy/bootstrap,icfantv/bootstrap,Foxandxss/bootstrap,infowrap/bootstrap,looker/bootstrap,caoruiy/bootstrap,burlhock/bootstrap,justin-john/bootstrap-1,benhalverson/bootstrap,Servoy/bootstrap,RobJacobs/bootstrap,deeg/bootstrap,Lincoln-xzc/angular-ui-bootstrap,byronigoe/bootstrap,shiftagent/ui-bootstrap,fpipita/bootstrap,shiftagent/ui-bootstrap,christor/bootstrap,292388900/bootstrap,christor/bootstrap,looker/bootstrap,connyay/bootstrap,benhalverson/bootstrap,caoruiy/bootstrap,RobJacobs/bootstrap,fpipita/bootstrap,angular-ui/bootstrap,justin-john/bootstrap-1,byronigoe/bootstrap,pdsoftplan/bootstrap,infowrap/bootstrap,benhalverson/bootstrap,292388900/bootstrap,vfiles/bootstrap,shootermv/bootstrap,davious/angular-ui-bootstrap,benhalverson/bootstrap,icfantv/bootstrap,davious/angular-ui-bootstrap