sober – Makes appearance of standard styles more "sober"

The pack­age makes head­ings less over­bear­ing, and re­duces the size of var­i­ous skips (no­tably those around head­ings, and within and around lists).
Sim­i­lar ef­fects are achieved, in a more sat­is­fac­tory fash­ion, in some of the classes in the nt­g­class col­lec­tion.