bug#2497: 23.0.91; Fails to read UTF-8 on Win2k

[Stefan Monnier]

>> The guessing shouldn't give priority to buffer-file-coding-system.
>> Instead we have the set-coding-system-priority instead. And IIUC utf-8
>> should always have a pretty high priority since false positives are
>> fairly rare. So this still looks like a real bug.

> Here I would like to note that I never had false positives in the past
> (before 23.0.91) but I do have false positives now. Therefore I'm
> inclined to call it a bug.

To clear things up: by "false positives" I meant text that Emacs thinks
is valid utf-8 whereas it's really using some other coding system.


        Stefan