[Groff] [Heirloom] Strange characters with MM

[Blake McBride]

Greetings,

If I process the following MM document:

Hello

with:  troff -mm file.mm |dpost >file.ps

file.ps has (in addition to what you would expect) two dashes in the upper
left of the page, and two dashes in the top right of the page.

groff -mm file.mm >file.ps

works correctly (without 4 extraneous dashes).

Thanks.

Blake