This one also caught by lintian (debian package checker tool).
.ti -8
.IR MODE " := "
.RB " [ " transport " | " tunnel " | " ro " | " beet " ] "
-.b (default=transport)
+.B (default=transport)
.ti -8
.IR FLAG-LIST " := "
.ti -8
.IR PTYPE " := "
.RB " [ " main " | " sub " ] "
-.b (default=main)
+.B (default=main)
.ti -8
.IR DIR " := "
.ti -8
.IR ACTION " := "
.RB " [ " allow " | " block " ]"
-.b (default=allow)
+.B (default=allow)
.ti -8
.IR LIMIT-LIST " := "
.ti -8
.IR TMPL-LIST " := "
-.b " [ "
+.B " [ "
.IR TMPL-LIST " ] | "
.RB " [ " tmpl
.IR TMPL " ] "
.ti -8
.IR MODE " := "
.RB " [ " transport " | " tunnel " | " beet " ] "
-.b (default=transport)
+.B (default=transport)
.ti -8
.IR LEVEL " := "
.RB " [ " required " | " use " ] "
-.b (default=required)
+.B (default=required)
.ti -8
.BR "ip xfrm monitor" " [ " all " | "