cmd/search: better handle non-TTY output.
cmd/search: better handle non-TTY output.

When `stdout` is not a TTY then using `ohai` is a bit unpleasant as it
prevents using pipes to do cool things with the output.

Homebrew/brew,nandub/brew,Homebrew/brew,Homebrew/brew,Homebrew/brew,nandub/brew,nandub/brew,nandub/brew