class Guard::Dsl

def evaluate(contents, filename, lineno) # :nodoc
  instance_eval(contents, filename.to_s, lineno)
rescue StandardError, ScriptError => e
  prefix = "\n\t(dsl)> "
  cleaned_backtrace = _cleanup_backtrace(e.backtrace)
  backtrace = "#{prefix}#{cleaned_backtrace.join(prefix)}"
  msg = "Invalid Guardfile, original error is: \n\n%s, \nbacktrace: %s"
  raise Error, format(msg, e, backtrace)
end