This is true of =, \_, and \= too.
On Wed, Sep 24, 2014 at 10:34 AM, Blake McBride <bl...@mcbride.name> wrote: > Greetings, > > Using the following: > > .TS > l . > _ > abcdefghijklmnopqrstuvwxyz > .TE > > > In groff, the line is unbroken (as is desired). In heirloom, a bunch of > dashes are produced. Each dash is separated by a small space. In other > words, groff produced a _line_, and heirloom troff produces a _series of > dashes_. Surely a line is desired. > > Thanks. > > Blake > >