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doc: minor cleanup of tls.getProtocol() #24533

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doc: minor cleanup of tls.getProtocol() #24533

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12 changes: 6 additions & 6 deletions doc/api/tls.md
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Expand Up @@ -756,19 +756,19 @@ to implement the `tls-unique` channel binding from [RFC 5929][].
added: v5.7.0
-->

* Returns: {string}
* Returns: {string|null}

Returns a string containing the negotiated SSL/TLS protocol version of the
current connection. The value `'unknown'` will be returned for connected
sockets that have not completed the handshaking process. The value `null` will
be returned for server sockets or disconnected client sockets.

Example responses include:
Protocol versions are:

* `TLSv1`
* `TLSv1.1`
* `TLSv1.2`
* `unknown`
* `'TLSv1'`
* `'TLSv1.1'`
* `'TLSv1.2'`
* `'SSLv3'`

See <https://www.openssl.org/docs/man1.1.0/ssl/SSL_get_version.html> for more
information.
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