```ruby
require 'thor'
require 'tumblfetch'

module Tumblfetch
  class CLI < Thor
    SETTINGS_EXIST_MSG =<<-EOS
`.tumblfetch` already exists in this directory.
    EOS

    SETTINGS_GENERATED_MSG =<<-EOS
`.tumblfetch` has been placed in this directory.
    EOS

    EXECUTE_TUMBLR_MSG =<<-EOS
`~/.tumblr` can't be found. Run `tumblr` for generating it.
For details, see https://github.com/tumblr/tumblr_client#the-irb-console
    EOS

    desc 'version', 'Print a version'
    def version
      puts Tumblfetch::VERSION
    end

    desc 'init', 'Generate a .tumblfetch'
    def init
      if File.exist?(File.join(ENV['HOME'], '.tumblr'))
        if File.exist?('./.tumblfetch')
          $stderr.puts(SETTINGS_EXIST_MSG)
        else
          File.open('./.tumblfetch', 'w') do |file|
            Tumblfetch.write_settings_template_to(file)
          end
          puts(SETTINGS_GENERATED_MSG)
        end
      else
        $stderr.puts(EXECUTE_TUMBLR_MSG)
      end
    end
  end
end
```

Use say(Thor::Actions) instead of puts
user
```ruby
require 'thor'
require 'tumblfetch'

module Tumblfetch
  class CLI < Thor
  include Thor::Actions

    SETTINGS_EXIST_MSG =<<-EOS
`.tumblfetch` already exists in this directory.
    EOS

    SETTINGS_GENERATED_MSG =<<-EOS
`.tumblfetch` has been placed in this directory.
    EOS

    EXECUTE_TUMBLR_MSG =<<-EOS
`~/.tumblr` can't be found. Run `tumblr` for generating it.
For details, see https://github.com/tumblr/tumblr_client#the-irb-console
    EOS

    desc 'version', 'Print a version'
    def version
      say Tumblfetch::VERSION
    end

    desc 'init', 'Generate a .tumblfetch'
    def init
      if File.exist?(File.join(ENV['HOME'], '.tumblr'))
        if File.exist?('./.tumblfetch')
          $stderr.puts(SETTINGS_EXIST_MSG)
        else
          File.open('./.tumblfetch', 'w') do |file|
            Tumblfetch.write_settings_template_to(file)
          end
          puts(SETTINGS_GENERATED_MSG)
        end
      else
        $stderr.puts(EXECUTE_TUMBLR_MSG)
      end
    end
  end
end
```
assistant