The Ruby style guide explicitly allows both of the following styles. The official Rubocop configuration accepts only the latter.
# good
[1, 2, 3].each {|num| puts num }
[1, 2, 3].each { |num| puts num }
There seems no way exists to allow both styles without entirely disabling Layout/SpaceInsideBlockBraces (unwanted styles such as [1, 2, 3].each{|foo| bar} will also be allowed).
Is that an option?