Things like lexgrog and whatis and apropos need to look a the line in
the NAME section in the manpage. There used to be a macro there which
they don't understand.
lexgrog top.1
top.1: parse failed
.\" ----------------------------------------------------------------------
.SH NAME
.\" ----------------------------------------------------------------------
-\*(We \- display Linux processes
+top \- display Linux processes
.\" ----------------------------------------------------------------------
.SH SYNOPSIS