Rubocop – how can I just display auto-correctable results

Question

I would like to run Rubocop and just see auto-correctable results. The documentation (https://docs.rubocop.org/rubocop/usage/basic_usage.html) indicates this should be possible with a --display-only-correctable flag.

But at the command line rubocop --display-only-correctable responds:

invalid option: --display-only-correctable
Did you mean? display-only-failed
For usage information, use –help

And from rubocop --help I don’t see any reference to the display-only-correctable flag.
Is it possible to just just display auto-correctable results?
Thanks
Daniel

Answer 1

@Andy Waite’s comment helped solve it. I was running rubocop version 1.25.1. The --display-only-correctable flag only arrived arrived in version 1.28.0. I changed my gemfile from:

gem 'rubocop', '~> 1.25', require: false

to

gem 'rubocop', require: false

then ran

bundle update

now rubocop --display-only-correctable works as expected.