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: exception_presenter.rb
    path of file: ./repos/rspec-core/lib/rspec/core/formatters
    
    the code of the file until where you have to start completion: # encoding: utf-8
RSpec::Support.requi
    
        def failure_slash_error_lines
          lines = read_failed_lines
          if lines.count == 1
            lines[0] = "Failure/Error: #{lines[0].strip}"
          else
            least_indentation = SnippetExtractor.least_indentation_from(lines)
            lines = lines.map { |line| line.sub(/^#{least_indentation}/, '  ') }
            lines.unshift('Failure/Error:')
          end