I'm mindful of the license here, but suspect that these lines crept in
after Matt Bishop's time. Text lines in a macro package can be
insidious because they cause formatting operations to start even in the
absence of an input document. The forthcoming groff 1.24 has a new
diagnostic to help catch these situations.
The groff Texinfo manual says:
A '\"' comment on a line by itself is treated as a blank line,
because after eliminating the comment, that is all that remains.
Test
\" comment
Test
=> Test
=>
=> Test
To compensate, it is common to combine the empty request with the
comment escape sequence as '.\"', causing the input line to be
ignored.
Fixes:
$ (cd doc && groff -t -M . -mn -mnh Guidebook.mn > /dev/null)
troffrc:./tmac.n:1: text line in startup file
troffrc:./tmac.n:764: text line in startup file