class Proc

def file_colon_line
  path, line = *to_s.match(PROC_PATTERN)[1..2]
  line = line.to_i - 1 if Cucumber::RUBY_1_9
  path = File.expand_path(path)
  pwd = Dir.pwd
  path = path[pwd.length+1..-1]
  "#{path}:#{line}"
end