Use the .At macro where appropriate.

libexec/makekey/makekey.8

@@ -55,4 +55,5 @@ and how the encrypted value is calculated.
 .Sh HISTORY
 A
 .Nm
-command appeared in Version 7 AT&T UNIX.
+command appeared in
+.At v7 .

sbin/dump/dump.8

@@ -350,4 +350,5 @@ for the operator running
 .Sh HISTORY
 A
 .Nm dump
-command appeared in Version 6 AT&T UNIX.
+command appeared in
+.At v6 .

sbin/mknod/mknod.8

@@ -104,4 +104,5 @@ will cause the number to be interpreted as octal.
 .Sh HISTORY
 A
 .Nm
-command appeared in Version 6 AT&T UNIX.
+command appeared in
+.At v6 .

usr.bin/cal/cal.1

@@ -78,4 +78,5 @@ calendar for that month is a bit unusual.
 .Sh HISTORY
 A
 .Nm
-command appeared in Version 6 AT&T UNIX.
+command appeared in
+.At v6 .

usr.bin/calendar/calendar.1

@@ -231,7 +231,8 @@ at the beginning of a line.
 .Sh HISTORY
 A
 .Nm
-command appeared in Version 7 AT&T UNIX.
+command appeared in
+.At v7 .
 
 .Sh BUGS
 .Nm Calendar

usr.bin/col/col.1

@@ -123,4 +123,5 @@ will display a warning message.
 A
 .Nm col
 command
-appeared in Version 6 AT&T UNIX.
+appeared in
+.At v6 .

usr.bin/look/look.1

@@ -101,4 +101,5 @@ This was incorrect and the current man page matches the historic
 implementation.
 .Sh HISTORY
 .Nm Look
-appeared in Version 7 AT&T Unix.
+appeared in
+.At v7 .

usr.bin/size/size.1

@@ -57,4 +57,5 @@ attempts to report on the file
 .Sh HISTORY
 A
 .Nm size
-command appeared in Version 6 AT&T Unix.
+command appeared in
+.At v6 .

usr.bin/size/size.1aout

@@ -57,4 +57,5 @@ attempts to report on the file
 .Sh HISTORY
 A
 .Nm size
-command appeared in Version 6 AT&T Unix.
+command appeared in
+.At v6 .