Do not use short answers for confirmations

Just learned about `use-short-answers` (from a comment [here][]).
However, when long answers are expected for confirmation, it's often an
indication that the question at hand might be serious enough to take the
time to type these out (as recommended by the docstring of
`use-short-answers`).

[here]: http://irreal.org/blog/?p=12595

init.el

@@ -122,9 +122,7 @@
       initial-major-mode 'fundamental-mode
       ring-bell-function #'ignore
       load-prefer-newer nil             ; t breaks `org-reload'
-      )
-
-(fset 'yes-or-no-p 'y-or-n-p)
+      use-short-answers nil)
 
 (setq-default fill-column 100)
 (setq-default indent-tabs-mode nil)