bug#38457: 27.0.50; dabbrev-expand regression due to message change

[Dmitry Gutov]

Hi Juri,

I like the new behavior quite a bit, and thanks for working on it.

Here's something that's a matter of taste, but:

On 20.12.2019 0:16, Juri Linkov wrote:
> +      (setq message (if (string-match-p "\\` *\\[.+\\]\\'" message)
> +                        ;; Make sure we can put-text-property.
> +                        (copy-sequence message)
> +                      (concat " [" message "]")))

I prefer how it looks without an extra space here. Meaning

  (concat "[" message "]")

instead of

  (concat " [" message "]")

. Apparently minibuffer contents always end with a space already?