bug#13124: 24.1; shell-mode does not hide sudo password prompts

[Chong Yidong]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>> How does one go about retrieving this information in a
>> platform-independent way?
>
> We could use various ad-hoc hacks for the various known cases, as
> a "best effort".

How is that different from having an ad-hoc list of "password" words,
other than being more difficult to implement?