Bot commands without args are not always encrypted for the bot

[kf5grd]

When a bot adevrtises a command but does not require any arguments, the Keybase client does not encrypt that command unless it is sent with a space at the end.

For example, the githubbot's list command, if sent as !github list (no space after list) will not be encrypted for the bot, but if sent as !github list<space> it does get properly encrypted and the bot responds as expected.

[joshblum]

@kf5grd this should be fixed with the corresponding client change