rb_file_expand_path 3676 file.c             return rb_file_expand_path(argv[0], argc > 1 ? argv[1] : Qnil);
rb_file_expand_path  472 include/ruby/intern.h VALUE rb_file_expand_path(VALUE, VALUE);
rb_file_expand_path  363 ruby.c             return rb_file_expand_path(path, Qnil);