You're desperate. Your legacy code-generation code outputs a Hash using hash#to_s. You've flouted many Rubocop rules to get to where you are. Suddenly, it gets too much. You search the Web for a pretty-print function that you want: a Rubocop-friendly Hash pretty-printer.

pretty_print_hash.rb

# @param hash [Hash]
# @return [String] rubocop-friendly pretty-printed hash
def pretty_print_hash(hash)
  with_19_keys = hash.to_s.gsub(/:(\w+)=>/, '\1: ')
  with_whitespace = with_19_keys.sub(/^{/, '{ ').sub(/}$/,' }')
  with_single_quotes = with_whitespace.gsub(/: \"([^"']*)\"/, ': \'\1\'')
end