nicer formatting for MAC info

The info printing for PBES2 already uses space after type and commas to
separate items in the line so use the same format for MAC info too.
Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1334)

apps/pkcs12.c

@@ -530,9 +530,9 @@ int pkcs12_main(int argc, char **argv)
         /* current hash algorithms do not use parameters so extract just name,
            in future alg_print() may be needed */
         X509_ALGOR_get0(&macobj, NULL, NULL, macalgid);
-        BIO_puts(bio_err, "MAC:");
+        BIO_puts(bio_err, "MAC: ");
         i2a_ASN1_OBJECT(bio_err, macobj);
-        BIO_printf(bio_err, " Iteration %ld\n",
+        BIO_printf(bio_err, ", Iteration %ld\n",
                    tmaciter != NULL ? ASN1_INTEGER_get(tmaciter) : 1L);
         BIO_printf(bio_err, "MAC length: %ld, salt length: %ld\n",
                    tmac != NULL ? ASN1_STRING_length(tmac) : 0L,