rubinius/rubinius — pull request #1327 by jc00ke (2011-10-22 00:43:51+00:00)
Title: Implement File#world_readable?

Following how MRI implemented this method,
I added a few constants to Stat:

S_IRUGO = (S_IRUSR | S_IRGRP | S_IROTH)
S_IWUGO = (S_IWUSR | S_IWGRP | S_IWOTH)
S_IXUGO = (S_IXUSR | S_IXGRP | S_IXOTH)