In the multi-file search window, only re-load the file in the bottom window when it really is a different file (ie, using a same-file predicate that involves opening the files and comparing the ports)
In the multi-file search window, only re-load the file
in the bottom window when it really is a different file
(ie, using a same-file predicate that involves opening
the files and comparing the ports)

closes PR 12635 (hopefully -- if not, then we can reopen)

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket