doc: reorder the string and int extract/expand param values
@@ -49,7 +49,7 @@ There are three modes that are currently defined:
=over 4
-=item B<EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND> "EXTRACT_AND_EXPAND"
+=item "EXTRACT_AND_EXPAND" or B<EVP_KDF_HKDF_MODE_EXTRACT_AND_EXPAND>
This is the default mode. Calling L<EVP_KDF_derive(3)> on an EVP_KDF_CTX set
up for HKDF will perform an extract followed by an expand operation in one go.
@@ -59,7 +59,7 @@ intermediate fixed-length pseudorandom key K is not returned.
In this mode the digest, key, salt and info values must be set before a key is
derived otherwise an error will occur.
-=item B<EVP_KDF_HKDF_MODE_EXTRACT_ONLY> "EXTRACT_ONLY"
+=item "EXTRACT_ONLY" or B<EVP_KDF_HKDF_MODE_EXTRACT_ONLY>
In this mode calling L<EVP_KDF_derive(3)> will just perform the extract
operation. The value returned will be the intermediate fixed-length pseudorandom
@@ -69,7 +69,7 @@ up by calling EVP_KDF_CTX_get_kdf_size() after setting the mode and digest.
The digest, key and salt values must be set before a key is derived otherwise
an error will occur.
-=item B<EVP_KDF_HKDF_MODE_EXPAND_ONLY> "EXPAND_ONLY"
+=item "EXPAND_ONLY" or B<EVP_KDF_HKDF_MODE_EXPAND_ONLY>
In this mode calling L<EVP_KDF_derive(3)> will just perform the expand
operation. The input key should be set to the intermediate fixed-length
