Correct errno markup. Noticed by schwarze.

Discussed with schwarze and jmc. ok schwarze

src/lib/libutil/ber_get_string.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: ber_get_string.3,v 1.2 2019/05/15 18:18:21 rob Exp $
+.\" $OpenBSD: ber_get_string.3,v 1.3 2019/05/16 17:39:21 rob Exp $
 .\"
 .\" Copyright (c) 2007, 2012 Reyk Floeter <reyk@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: May 15 2019 $
+.Dd $Mdocdate: May 16 2019 $
 .Dt BER_GET_STRING 3
 .Os
 .Sh NAME
@@ -89,7 +89,7 @@ and
 .Fn ber_scanf_elements
 return 0.
 Otherwise \-1 is returned and the global variable
-.Vt errno
+.Va errno
 is set to indicate the error.
 .Pp
 .Fn ber_getpos

src/lib/libutil/ber_read_elements.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: ber_read_elements.3,v 1.3 2019/05/15 18:18:21 rob Exp $
+.\" $OpenBSD: ber_read_elements.3,v 1.4 2019/05/16 17:39:21 rob Exp $
 .\"
 .\" Copyright (c) 2007, 2012 Reyk Floeter <reyk@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: May 15 2019 $
+.Dd $Mdocdate: May 16 2019 $
 .Dt BER_READ_ELEMENTS 3
 .Os
 .Sh NAME
@@ -154,7 +154,7 @@ or \-1 on failure.
 .Fn ber_write_elements
 returns the number of bytes written.
 Otherwise \-1 is returned and the global variable
-.Vt errno
+.Va errno
 is set to indicate the error.
 .Sh SEE ALSO
 .Xr read 2 ,