A progress reporter that behaves nicely with threaded downloading.
Indicates the download is complete.
 
               # File rubygems/user_interaction.rb, line 602
def done
  # Do nothing.
end
             
            Tells the download reporter that the file_name is being fetched. The other arguments are ignored.
 
               # File rubygems/user_interaction.rb, line 585
def fetch(file_name, *args)
  if @file_name.nil?
    @file_name = file_name
    locked_puts "Fetching #{@file_name}"
  end
end