.nr LL 6.5i
.nr LT 6.5i
.\" arg1 is secno, arg2 is starting page no, arg3 is title
.de XX
.nr %# \\$2
.ds %e .tl |\\$3||\\f(NI\\$1\\fP|
.ds %o .tl |\\f(NI\\$1\\fP||\\$3|
.ds %E .tl |\\\\n(PN-i|||
.ds %O .tl |||\\\\n(PN-i|
..
.\" print nothing visible
.de BB
\0
.sp -1
..
.de MB
.KS L
.so \\$1.so
.KE
..
.ds cr \h'3p'\s+3\fS\N'191'\fP\s-3
.\" so startup doesn't break title matching for index
.br