* lisp/misearch.el (multi-isearch-read-buffers): Fix last change

These are not buffers but buffer names.
3 jobs for master in 10 minutes and 59 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Fast
passed #16759
test-fast-inotify

00:08:03

 
  Normal
passed #16760
test-lisp-inotify

00:02:56

passed #16761
test-lisp-net-inotify

00:01:51