Re: Navigating completions from minibuffer

[Juri Linkov]

>> This change:
>> f0c0ff6bf23 * New option to use arrows in the minibuffer to select 
>> completions (bug#59486)
>> works really well but appears to  introduce a separate problem:
>>
>> Assume you have a command  e.g. foo but also foo-bar and foo-bas.
>>
>> Earlier you could type M-x foo and press enter to invoke foo.
>>
>> Now, with the new option enabled, typing
>> M-x foo
>> appears to require that you first press TAB before pressing RET.
>
> The problem is that now RET calls minibuffer-choose-completion,
> whereas exit-minibuffer is what you want if what you have typed is a
> valid completion already; Perhaps we need
> minibuffer-choose-completion-or-exit-minibuffer ...

Agreed.  When a completion candidate is not selected
let's use the contents of the minibuffer.
Please try this patch:

diff --git a/lisp/minibuffer.el b/lisp/minibuffer.el
index 4e8590989b3..0410e3a0b8d 100644
--- a/lisp/minibuffer.el
+++ b/lisp/minibuffer.el
@@ -3005,7 +3005,7 @@ minibuffer-visible-completions-map
   "<right>" (minibuffer-visible-completions-bind #'minibuffer-next-completion)
   "<up>"    (minibuffer-visible-completions-bind 
#'minibuffer-previous-line-completion)
   "<down>"  (minibuffer-visible-completions-bind 
#'minibuffer-next-line-completion)
-  "RET"     (minibuffer-visible-completions-bind 
#'minibuffer-choose-completion)
+  "RET"     (minibuffer-visible-completions-bind 
#'minibuffer-choose-completion-or-exit)
   "C-g"     (minibuffer-visible-completions-bind 
#'minibuffer-hide-completions))
 
 
@@ -4693,6 +4693,12 @@ minibuffer-choose-completion
     (let ((completion-use-base-affixes t))
       (choose-completion nil no-exit no-quit))))
 
+(defun minibuffer-choose-completion-or-exit (&optional no-exit no-quit)
+  (interactive "P")
+  (condition-case nil
+      (minibuffer-choose-completion no-exit no-quit)
+    (error (exit-minibuffer))))
+
 (defun minibuffer-complete-history ()
   "Complete the minibuffer history as far as possible.
 Like `minibuffer-complete' but completes on the history items