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);