coding_arg_mnemonic 10968 src/coding.c     Lisp_Object val = args[coding_arg_mnemonic];
coding_arg_mnemonic 12208 src/coding.c         args[coding_arg_mnemonic] = make_fixnum ('='),
coding_arg_mnemonic 12231 src/coding.c     plist[3] = args[coding_arg_mnemonic] = make_fixnum ('-');