We want all deprecations to go through `RSpec.deprecate` so that they are subject to user configuration (e.g. to have them piped into a file, or converted to errors).  So this should be:

``` ruby
RSpec.deprecate("requiring `rspec/autorun` when running RSpec via the `rspec` command")
```

(I also changed the wording a bit: consider that it's common for users to have textmate/vim/sublime/emacs key bindings to run specs, which still do so via the `rspec` command but isn't the user invoking it directly from the command line).