Fix copy-paste error that left a paragraph ending in a comma

Author: tb

src/lib/libcrypto/man/BIO_push.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: BIO_push.3,v 1.11 2022/12/07 23:08:47 schwarze Exp $
+.\" $OpenBSD: BIO_push.3,v 1.12 2022/12/08 11:33:58 tb Exp $
 .\" full merge up to:
 .\" OpenSSL doc/man3/BIO_push.pod 791bfd91 Nov 19 20:38:27 2021 +0100
 .\" OpenSSL doc/man7/bio.pod 1cb7eff4 Sep 10 13:56:40 2019 +0100
@@ -67,7 +67,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: December 7 2022 $
+.Dd $Mdocdate: December 8 2022 $
 .Dt BIO_PUSH 3
 .Os
 .Sh NAME
@@ -188,7 +188,7 @@ and if
 is not at the end of its chain,
 the tail of that chain starting after
 .Fa b
-is cut off and becomes a separate chain,
+is cut off and becomes a separate chain.
 .Pp
 For portability, it is best to make sure that
 .Fa b