question about m4 - macro preprocessor

[Doug Gwyn]

In article <3201 at mrsvr.UUCP> carl at gemed.ge.com (Carl Crawford) writes:
>i am using the macro preprocessor m4 with files that are
>subsequently passed to troff. m4 replaces lines that 
>contain m4 commands with blank lines. the blank lines
>disrupt the text that is passed to troff. does anyone know 
>how to run m4 so that the blank lines can be eliminated?

Yes, end the m4 commands with a dnl command.