doc: fix "the a" typos (and other things nearby)

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/23068)

(cherry picked from commit aa3347ba9d670a747b46974ce46f2ed9ecb38662)

doc/man1/openssl-pkeyutl.pod.in

@@ -235,9 +235,9 @@ This sets the RSA padding mode. Acceptable values for I<mode> are B<pkcs1> for
 PKCS#1 padding, B<none> for no padding, B<oaep>
 for B<OAEP> mode, B<x931> for X9.31 mode and B<pss> for PSS.
 
-In PKCS#1 padding if the message digest is not set then the supplied data is
+In PKCS#1 padding, if the message digest is not set, then the supplied data is
 signed or verified directly instead of using a B<DigestInfo> structure. If a
-digest is set then the a B<DigestInfo> structure is used and its the length
+digest is set, then the B<DigestInfo> structure is used and its length
 must correspond to the digest type.
 
 For B<oaep> mode only encryption and decryption is supported.

doc/man1/openssl-req.pod.in

@@ -282,7 +282,7 @@ It is implied by the B<-CA> option.
 This option implies the B<-new> flag if B<-in> is not given.
 
 If an existing request is specified with the B<-in> option, it is converted
-to the a certificate; otherwise a request is created from scratch.
+to a certificate; otherwise a request is created from scratch.
 
 Unless specified using the B<-set_serial> option,
 a large random number will be used for the serial number.

doc/man3/BIO_f_md.pod

@@ -19,7 +19,7 @@ BIO_f_md, BIO_set_md, BIO_get_md, BIO_get_md_ctx - message digest BIO filter
 =head1 DESCRIPTION
 
 BIO_f_md() returns the message digest BIO method. This is a filter
-BIO that digests any data passed through it, it is a BIO wrapper
+BIO that digests any data passed through it.  It is a BIO wrapper
 for the digest routines EVP_DigestInit(), EVP_DigestUpdate()
 and EVP_DigestFinal().
 
@@ -36,8 +36,8 @@ BIO_set_md() sets the message digest of BIO B<b> to B<md>: this
 must be called to initialize a digest BIO before any data is
 passed through it. It is a BIO_ctrl() macro.
 
-BIO_get_md() places the a pointer to the digest BIOs digest method
-in B<mdp>, it is a BIO_ctrl() macro.
+BIO_get_md() places a pointer to the digest BIOs digest method
+in B<mdp>.  It is a BIO_ctrl() macro.
 
 BIO_get_md_ctx() returns the digest BIOs context into B<mdcp>.
 

doc/man3/SSL_CTX_set_tlsext_ticket_key_cb.pod

@@ -42,8 +42,8 @@ ticket construction state according to RFC5077 Section 4 such that per session
 state is unnecessary and a small set of cryptographic variables needs to be
 maintained by the callback function implementation.
 
-In order to reuse a session, a TLS client must send the a session ticket
-extension to the server. The client can only send exactly one session ticket.
+In order to reuse a session, a TLS client must send the session ticket
+extension to the server. The client must send exactly one session ticket.
 The server, through the callback function, either agrees to reuse the session
 ticket information or it starts a full TLS handshake to create a new session
 ticket.