class RSpec::Core::BacktraceCleaner

def initialize(inclusion_patterns=nil, exclusion_patterns=DEFAULT_EXCLUSION_PATTERNS.dup)
  @exclusion_patterns = exclusion_patterns
  if inclusion_patterns.nil?
    @inclusion_patterns = (matches_an_exclusion_pattern? Dir.getwd) ? [Regexp.new(Dir.getwd)] : []
  else
    @inclusion_patterns = inclusion_patterns
  end
end