mdoc(7) police: fix the .Nd line broken in previous revision.

Noticed by:	bde

Use .Bx for ``BSD''.

lib/libc/stdlib/strtoul.3

@@ -41,7 +41,7 @@
 .Os
 .Sh NAME
 .Nm strtoul , strtoull , strtouq
-.Nd "convert a string to an unsigned long , unsigned long long , or uquad_t integer"
+.Nd "convert a string to an unsigned long, unsigned long long, or uquad_t integer"
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
@@ -187,7 +187,8 @@ The
 function
 conforms to
 .St -isoC-99 .
-The BSD
+The
+.Bx
 .Fn strtoq
 function is deprecated.
 .Sh BUGS