bib­mods – Tighter tol­er­ances for bib­li­ogra­phies

LaTeX uses \sloppy in the bib­li­og­ra­phy in its stan­dard classes. This can lead to un­pleas­antly wide spac­ing, as TeX tries to set the page flush at both sides.
The pack­age sets a tighter tol­er­ance, and al­lows some \emer­gen­cys­tretch, thus lead­ing to bet­ter type­set­ting.