ivy-resume does not validate that buffer is same as original

[articuluxe]

Use swiper to search for a string that is present in file
There is a list of matches
Change to a different buffer
Execute ivy-resume
Swiper result set is the same one, though it no longer applies

[abo-abo]

Thanks. It's tricky, since for most other commands, like describe-function, changing the buffer isn't the right thing to do. So I added an exception specifically for swiper.