RuboCop can't autocorrect default Rails setup script

[deivid-rodriguez]

After getting the file

wget https://raw.githubusercontent.com/rails/rails/3186fe582c76f9f05bf3b87e4a4e2e5b09ce770c/railties/lib/rails/generators/rails/app/templates/bin/setup

running RuboCop on it spits an offense

$ bundle exec rubocop setup
Inspecting 1 file
C

Offenses:

setup:18:26: C: Use || instead of or.
  system('bundle check') or system!('bundle install')
                         ^^

1 file inspected, 1 offense detected

which is not corrected

$ bundle exec rubocop setup -a
Inspecting 1 file
C

Offenses:

setup:18:26: C: Use || instead of or.
  system('bundle check') or system!('bundle install')
                         ^^

1 file inspected, 1 offense detected

even though the auto-generated config tells me it is "correctable"

$ bundle exec rubocop setup --auto-gen-config
Inspecting 1 file
C

Offenses:

setup:18:26: C: Use || instead of or.
  system('bundle check') or system!('bundle install')
                         ^^

1 file inspected, 1 offense detected
Created .rubocop_todo.yml.
Run `rubocop --config .rubocop_todo.yml`, or add `inherit_from: .rubocop_todo.yml` in a .rubocop.yml file.

$ cat .rubocop_todo.yml 
# This configuration was generated by
# `rubocop --auto-gen-config`
# on 2016-01-09 17:28:15 +0100 using RuboCop version 0.35.1.
# The point is for the user to remove these configuration records
# one by one as the offenses are removed from the code base.
# Note that changes in the inspected code, or installation of new
# versions of RuboCop, may require this file to be generated again.

# Offense count: 1
# Cop supports --auto-correct.
# Configuration parameters: EnforcedStyle, SupportedStyles.
# SupportedStyles: always, conditionals
Style/AndOr:
  Exclude:
    - 'setup'

Bug or missing / misunderstanding something?

[alexdowad]

This is a really interesting problem!! Thanks for finding it!

The problem is the __FILE__ which appears in the source file.

[alexdowad]

I've got a fix. This made my day, thanks.

[alexdowad]

The trickiest thing is coming up with a name for a new PR.