class Rufo::Command

def squiggly_heredoc_warning
  <<-EOF
fo Warning!
File#{squiggly_pluralize} #{squiggly_warning_files} #{squiggly_pluralize(:has)} not been formatted due to a problem with Ruby version #{RUBY_VERSION}
Please update to Ruby #{backported_version} to fix your formatting!
See https://github.com/ruby-formatter/rufo/wiki/Squiggly-Heredocs for information.
  EOF
end