bug#63648: 29.0.90; project.el: with switch-use-entire-map, switch-project errors on non-project commands

[Juri Linkov]

>> 1. wants to print the new value of default-directory
>>    because 'C-h v' is the next command for which
>>    the value of default-directory was explicitly set.
>>
>> 2. wants to print the original value of default-directory
>>    because 'C-h v' was invoked in the buffer where
>>    the value of default-directory should stay unchanged.
>
> I would argue that it's in class 1.  Or at least, it would make sense
> for C-h v to print the new value.

I agree.  And the latest patch does this.  It prints the new value
on 'C-x p p ... C-h v'.  Then you can type 'g' and it reverts to
the original value.