Issue 40 in robotframework-sshlibrary: Login problem with the keyword With Public Key without password

[robotframework-sshlibrary]

Status: New
Owner: ----
Labels: Type-Defect Priority-Medium
New issue 40 by jrvi...@gmail.com: Login problem with the keyword With  
Public Key without password
http://code.google.com/p/robotframework-sshlibrary/issues/detail?id=40

According to documentation:

Logs into SSH server with given information using key-based authentication.
`username` is the username on the remote system.
`keyfile` is a path to a valid OpenSSH private key file.
`password` is used to unlock `keyfile` if unlocking is required.

if unlocking si not required:
Keyword 'SSHLibrary.Login With Public Key' expected 3 arguments, got 2.