Yield to erc-move-to-prompt before unhiding prompt

* lisp/erc/erc-backend.el (erc--hide-prompt): Change hook depth from 0
to 91 to allow the `move-to-prompt' module to do its thing.  This
feature was added by bug#54826 and first appeared in Emacs 29.
* lisp/erc/erc-common.el (erc-server-user): Remove erroneous comment.
The `buffers' field is a list of buffers.
* test/lisp/erc/erc-tests.el (erc-hide-prompt): Use `erc--target'
instead of `erc-default-recipients' because this is new code.

1 files changed, 2 insertions, 2 deletions

diff --git a/test/lisp/erc/erc-tests.el b/test/lisp/erc/erc-tests.el
index 40a2d2de657..d6c63934163 100644
--- a/test/lisp/erc/erc-tests.el
+++ b/test/lisp/erc/erc-tests.el
@@ -147,7 +147,7 @@
       (should (looking-at-p (regexp-quote erc-prompt)))
       (setq erc-server-process (buffer-local-value 'erc-server-process
                                                    (get-buffer "ServNet"))
-            erc-default-recipients '("#chan")))
+            erc--target (erc--target-from-string "#chan")))
 
     (with-current-buffer (get-buffer-create "bob")
       (erc-tests--send-prep)
@@ -155,7 +155,7 @@
       (should (looking-at-p (regexp-quote erc-prompt)))
       (setq erc-server-process (buffer-local-value 'erc-server-process
                                                    (get-buffer "ServNet"))
-            erc-default-recipients '("bob")))
+            erc--target (erc--target-from-string "bob")))
 
     (ert-info ("Value: t (default)")
       (should (eq erc-hide-prompt t))