(artist-mode): Warn about proportional fonts

* lisp/textmodes/artist.el (artist-mode): Warn about proportional
fonts (bug#24175).

1 files changed, 3 insertions, 1 deletions

diff --git a/lisp/textmodes/artist.el b/lisp/textmodes/artist.el
index af7bcc77cdf..7c261f8d2d1 100644
--- a/lisp/textmodes/artist.el
+++ b/lisp/textmodes/artist.el
@@ -1401,7 +1401,9 @@ Keymap summary
          (artist-mode-exit))
         (t
          ;; Turn mode on
-         (artist-mode-init))))
+         (artist-mode-init)
+         (unless (font-get (face-attribute 'default :font) :spacing)
+           (message "The default font isn't monospaced, so the drawings in this buffer may look odd")))))
 
 ;; Init and exit
 (defun artist-mode-init ()