11622 clean up rarer mandoc lint warnings

@@ -1,11 +1,10 @@
 .TH WHOIS 1 "Oct 2, 2009"
 .SH NAME
 \fBwhois\fP
 \- Internet domain name and network number directory service
 .SH SYNOPSIS
-.br
 \fBwhois\fP
 [\fB\-aAbfgiIklmQr\fP]
 [\fB\-c\fP \fIcountry-code\fP | \fIFl\fP h \fIhost\fP]
 [\fB\-p\fP \fIport\fP]
 \fIname\fP...