class RSpec::Core::BacktraceFormatter

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