Add missing section numbers to .Xr; found while testing mandocdb(8).

While here, improve the wording at one place.
OK jmc@.

1 files changed, 8 insertions, 9 deletions

diff --git a/lib/libc/gen/exec.3 b/lib/libc/gen/exec.3
index 52ac332ee9a..56bba41957b 100644
--- a/lib/libc/gen/exec.3
+++ b/lib/libc/gen/exec.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: exec.3,v 1.23 2013/07/17 05:42:11 schwarze Exp $
+.\"	$OpenBSD: exec.3,v 1.24 2014/01/20 08:46:45 schwarze Exp $
 .\"
 .\" Copyright (c) 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: July 17 2013 $
+.Dd $Mdocdate: January 20 2014 $
 .Dt EXEC 3
 .Os
 .Sh NAME
@@ -58,11 +58,10 @@ The
 .Nm exec
 family of functions replace the current process image with a
 new process image.
-The functions described in this manual page are front-ends for the function
-.Xr execve 2 .
-(See the manual page for
-.Xr execve
-for detailed information about the replacement of the current process.)
+The functions described in this manual page are front-ends for the
+.Xr execve 2
+system call; see that manual page for detailed information
+about the replacement of the current process.
 .Pp
 The initial argument for these functions is the pathname of a file which
 is to be executed.
@@ -143,7 +142,7 @@ is used instead, its value being:
 In addition, certain errors are treated specially.
 .Pp
 If permission is denied for a file (the attempted
-.Xr execve
+.Xr execve 2
 returned
 .Er EACCES ) ,
 these functions will continue searching the rest of
@@ -154,7 +153,7 @@ set to
 .Er EACCES .
 .Pp
 If the header of a file isn't recognized (the attempted
-.Xr execve
+.Xr execve 2
 returned
 .Er ENOEXEC ) ,
 these functions will execute the shell with the path of