```ruby
module NavigationHelpers
  # Maps a name to a path. Used by the
  #
  #   When /^I go to (.+)$/ do |page_name|
  #
  # step definition in web_steps.feature
  #
  def path_to(page_name)
    case page_name

    when /^the list of users\s?page$/
      '/users'

    else
      begin
        page_name =~ /^the (.*) page$/
        path_components = $1.split(/\s+/)
        send(path_components.push('path').join('_').to_sym)
      rescue NoMethodError, ArgumentError
        raise "Can't find mapping from \"#{page_name}\" to a path.\n" +
          "Now, go and add a mapping in #{__FILE__}"
      end
    end
  end
end

World(NavigationHelpers)
```

Use \ instead of + to concatenate those strings
user
```ruby
module NavigationHelpers
  # Maps a name to a path. Used by the
  #
  #   When /^I go to (.+)$/ do |page_name|
  #
  # step definition in web_steps.feature
  #
  def path_to(page_name)
    case page_name

    when /^the list of users\s?page$/
      '/users'

    else
      begin
        page_name =~ /^the (.*) page$/
        path_components = $1.split(/\s+/)
        send(path_components.push('path').join('_').to_sym)
      rescue NoMethodError, ArgumentError
        raise "Can't find mapping from \"#{page_name}\" to a path.\n" \
              "Now, go and add a mapping in #{__FILE__}"
      end
    end
  end
end

World(NavigationHelpers)
```
assistant