Hi Juri:

The proposal seems reasonable for me and simple enough.

I configured my Emacs to just add one ! long time ago. I just ensure that warn face frontend color is different to error face frontend color. 


On February 13, 2025 8:41:59 AM GMT+01:00, Juri Linkov <juri@linkov.net> wrote:
>Flymake makes the margin unnecessarily wide.
>Its 2 columns width creates too much empty space.
>All this to accommodate 2 characters of "!!".
>Whereas in the fridge it nicely fits into 1 column
>with `flymake-double-exclamation-mark'.
>It's possible to achieve the same for the margin case
>by using 1-character wide indicator ‼ with
>
>  `((error ,(if (char-displayable-p ?‼) "‼" "!!") compilation-error)
>
>