=item B<-pubin>
-by default a private key is input file with this option a public key is input
-instead.
+by default a private key is read from the input file: with this
+option a public key is read instead.
=item B<-pubout>
-by default a private key is output with this option a public
-key will be output instead. This option is automatically set if the input is
-a public key.
+by default a private key is output: with this option a public
+key will be output instead. This option is automatically set if
+the input is a public key.
=back
-----BEGIN RSA PRIVATE KEY-----
-----END RSA PRIVATE KEY-----
+The PEM public key format uses the header and footer lines:
+
+ -----BEGIN PUBLIC KEY-----
+ -----END PUBLIC KEY-----
+
=head1 EXAMPLES
To remove the pass phrase on an RSA private key: