AAP Source Control Credentials based on SSH Keys require blank line at end.

Description:

When you setup an ssh-key based Source Control credential in AAP, you can populate the "SCM Private Key" field by either pasting in the private key, or by selecting a file to upload. Once populated, the text of the private key appears in this field. When you attempt to use this key, it will fail with an error: "Invalid Format" unless a blank line is present at the end of the key.

I understand that this is likely an issue with SSH itself, however the AAP UI should check for this and either prompt the user when they attempt to save the credential, or automatically add the required blank line if not present.