    # File lib/yard/parser/ruby/ruby_parser.rb, line 62
            def file_encoding
              return nil unless defined?(::Encoding)
              return @file_encoding if @file_encoding
              return Encoding.default_internal unless @encoding_line
              if match = @encoding_line.match(SourceParser::ENCODING_LINE)
                @file_encoding = match.captures.last
              end
            end