You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cleaner.rb
    path of file: ./repos/brew/Library/Homebrew
    
    the code of the file until where you have to start completion: # Cleans a newly installed keg.
# By default:
#
# * removes `.la` files
# * removes `perllocal.pod` files
# * removes `.packlist` files
# * removes empty directories
# * sets permissions on executables
# * removes unresolved symlinks
class Cleaner
  # Create a cleaner for the given formula
  def initialize(f)
    @f = f
  end

  # Clean the keg of formula @f
  def clean
    ObserverPathnameExtension.reset_counts!

    # Many formulae include 'lib/charset.alias', but it is not strictly needed
    # and will conflict if more than
    
  def clean
    ObserverPathnameExtension.reset_counts!

    # Many formulae include 'lib/charset.alias', but it is not strictly needed
    # and will conflict if more than one formula provides it
    observe_file_removal @f.lib/"charset.alias"

    [@f.bin, @f.sbin, @f.lib].each { |d| clean_dir(d) if d.exist? }

    # Get rid of any info 'dir' files, so they don't conflict at the link stage
    info_dir_file = @f.info + "dir"
    if info_dir_file.file? && !@f.skip_clean?(info_dir_file)
      observe_file_removal info_dir_file
    end

    prune
  end