Possible landing bot issues

[David Cheney]

Hello,

I think there are two problems with the current landing bot.

1. the bot doesn't appear to NACK changes that are not gofmt'd, this
means changes land which others cannot fix because their .gitconfig
prevents them.

2. the bot doesn't appear to be enforcing it's lockdown rules as the
comment it places on the PR contains the magic string that the bot
looks for when it see's another $$ instruction.

Thank you for your time.

Dave