[Fix #663] Make guru-mode warn by default

README.md

@@ -587,19 +587,17 @@ If you get some http connection error related to the MELPA repo
 just do a manual `M-x package-refresh-contents` and restart Emacs
 afterwards.
 
-### No arrow navigation in editor buffers
+### Warnings on arrow navigation in editor buffers
 
 This is not a bug - it's a feature! I firmly believe that the one true
 way to use Emacs is by using it the way it was intended to be used (as
-far as navigation is concerned at least). That's why I've disabled all
-movement commands with arrows (and keys like page up, page down,
-etc) - to prevent you from being tempted to use them.
+far as navigation is concerned at least). 
 
-If you'd like to be able to use the arrow keys (but still be reminded of
-the alternatives) put this in your personal config:
+If you'd like to be take this a step further and disable the arrow key navigation
+completely put this in your personal config:
 
 ```lisp
-(setq guru-warn-only t)
+(setq guru-warn-only nil)
 ```
 
 To disable `guru-mode` completely add the following snippet to your

modules/prelude-programming.el

@@ -117,6 +117,9 @@ This functions should be added to the hooks of major modes for programming."
          '(((lambda (&rest _ignored)
               (prelude-smart-open-line-above)) "RET")))
 
+;; enlist a more liberal guru
+(setq guru-warn-only t)
+
 (defun prelude-prog-mode-defaults ()
   "Default coding hook, useful with any programming language."
   (when (and (executable-find ispell-program-name)