class RSpec::Core::BacktraceFormatter

def initialize
  @full_backtrace = false
  @system_exclusion_patterns = [] << Regexp.union(
    *["/lib\d*/ruby/",
      "org/jruby/",
      "bin/",
      "/gems/",
      "lib/rspec/(core|expectations|matchers|mocks)"].
    map {|s| Regexp.new(s.gsub("/", File::SEPARATOR))})
  @exclusion_patterns = [] + @system_exclusion_patterns
  @inclusion_patterns = [Regexp.new(Dir.getwd)]
end