bug#46609: Fix shell password prompt in minibuffer (bug 43302)

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> I am not a Unicode expert and don't know if there might be undesirable
>> side-effects from using :space: instead of :blank:. However, in my
>> manual testing these change give me the exact behavior I'm after.
>
> I'm a bit worried by the [[:space:]]* part: it would match any number
> of newlines and ^L characters, right?  Is that what we want here?

I think so -- matching "Password: \n\n" makes as much sense as matching
"Password: \n", I think?

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