fixup! fixup! openssl-pkeyutl.pod.in: improve description of -rawin a…

…nd -digest options

doc/man1/openssl-pkeyutl.pod.in

@@ -149,7 +149,7 @@ Sign the input data and output the signed result. This requires a private key.
 Using a message digest operation along with this is recommended -
 see the B<-rawin> and B<-digest> options for details.
 Otherwise, the input data given with the B<-in> option is assumed to already
-be a digest, but this may then require an additional B<-pkeyopt>I<digest>:I<md>
+be a digest, but this may then require an additional B<-pkeyopt> C<digest:>I<md>
 in some cases (e.g., RSA with the default PKCS#1 padding mode).
 Even for other algorithms like ECDSA, where the additional B<-pkeyopt> option
 does not affect signature output, it recommended to use