auto-modes.el: explain what pyx files are

diff --git a/auto-modes.el b/auto-modes.el
index 7a59b0077f490612b20cf8fccd9949962a2f640e..57280a55d8dd741d57095b148615e2aae3897aad 100644 (file)
--- a/auto-modes.el
+++ b/auto-modes.el
@@ -30,7 +30,7 @@
        '("\\.module$" . php-mode) ;; Drupal modules
 
        ;; python-mode
-       '("\\.pyx?$" . python-mode)
+       '("\\.pyx?$" . python-mode) ;; Cython files
 
        ;; Perhaps surprisingly, I do not use Emacs as my PDF viewer.
        '("\\.pdf$" . fundamental-mode)