If the author wanted to emphasize these terms then they should have used Sy or Em, but I wasn't convinced that the terms below needed emphasis so I just removed the Nm usage altogether.
Index: ctags.1 =================================================================== RCS file: /cvs/src/usr.bin/ctags/ctags.1,v retrieving revision 1.30 diff -u -p -r1.30 ctags.1 --- ctags.1 22 Aug 2015 06:46:00 -0000 1.30 +++ ctags.1 14 Oct 2015 20:08:43 -0000 @@ -200,12 +200,7 @@ The command appeared in .Bx 2 . .Sh BUGS -Recognition of -.Nm functions , -.Nm subroutines , -and -.Nm procedures -for +Recognition of functions, subroutines, and procedures for .Tn FORTRAN and Pascal is done in a very simple-minded way. No attempt
