def exclude_file_options(parser)
      parser.on("-e", "--exclude file1,...", Array,
                "List of file names to exclude") do |files_list|
        options[:excluded_files] = []
        files_list.each do |short_file|
          options[:excluded_files] << File.expand_path(short_file)
        end
      end
    end
def exclude_file_options(parser)
      parser.on("-e", "--exclude file1,...", Array,
                "List of file names to exclude") do |files_list|
        options[:excluded_files] = []
        files_list.each do |short_file|
          options[:excluded_files] << File.expand_path(short_file)
        end
      end
    end
Adds the excluded file options to the options hash
 @api private
 @return [Hash]