This reverts commit 28f82411.

- It seems to have been inadvertently removed as part of Rails 5
  upgrade: https://gitlab.com/gitlab-org/gitlab/-/commit/44fef4fe

Prevents output like this:

    Array values in the parameter are deprecated. Please use a String or nil.
    An Array was passed in from bin/rspec:3:in `load'

Now possible to run:
`bin/rails`
`bin/rspec`
`bin/spinach`
`bin/rake`