Tab Leaders
http://www.itcfonts.com/Ulc/4012/TabLeaders.htm

Strizver, Ilene
Upper and lowercase Magazine
2007

Abstract:

Does designing a table of contents drive you dotty? Next time, remember to say “take me to your tab leader.” Learning how to use your application’s automated tab leader function is a great way to save time and keep your layouts looking professional, down to the last detail.