The instructions for using public-key authentication with lsst-dev assume the user has OpenSSH. While this does not prevent users from translating the instructions to their own SSH software, it does cause a confusing bug if the user isn't aware that OpenSSH (or, specifically, the ~/.ssh/authorized_keys file) only accepts one-line keys and not the more common multi-line PEM format.

I propose that a note be added to the end of "1. Generate a key pair" warning non-OpenSSH users to make sure their public key is in the one-line format.