sudoers.d: add modelines, remove prettier comment

etc/sudoers.d/README.md

@@ -1,4 +1,2 @@
-<!-- @format -->
-
 The names may not contain a dot, the RHEL sudo is wheel (not to be confused
 with Debian's passwordless sudo) and the proper permissions are 0400.

etc/sudoers.d/always-ask-password

@@ -1,3 +1,5 @@
 # Inspired from Tails. This may break the expectation of "sudo mode", but
 # saves me from constantly entering "sudo -k"
 Defaults timestamp_timeout=0
+
+# vim: filetype=sudoers

etc/sudoers.d/password-feedback

@@ -1,5 +1,7 @@
 # Tails has this and I suspect it may be less confusing for less technical
 # people around.
 defaults pwfeedback
-# WARNING! Syntax error on Fedora 40, but doesn't stop using sudo. You might
-# want to not apply this with it!
+# WARNING! Syntax error on Fedora 40 and Arch Linux, but doesn't stop using
+# sudo. You mightwant to not apply this with them!
+
+# vim: filetype=sudoers