Update documentation for :defer t

doc/LAYERS.org

@@ -228,16 +228,16 @@ The aspiring layer author is recommended to have a look at the =use-package=
 This simply loads Helm. It is essentially equivalent to =(require 'helm)=.
 
 #+begin_src emacs-lisp
-(use-package helm
-  :defer t)
+(use-package helm)
 #+end_src
 
-This defers the loading of Helm using the auto-load facility and the auto-load
-commands provided by the Helm source code. It is, in fact, a no-op.
+By default =use-package= will try to defer the loading of the packages by using
+the auto-load facility and the auto-load commands provided by the package source
+code. So actually in the example above the code won't load =Helm= until one of
+the auto-loaded functions is called.
 
 #+begin_src emacs-lisp
 (use-package helm
-  :defer t
   :init
   ;; Code to execute before Helm is loaded
   :config
@@ -251,6 +251,15 @@ section is not executed until after loading, if ever. It is essentially
 equivalent to simply running the =:init= block, and then adding the =:config=
 block in an =with-eval-after-load=.
 
+#+begin_src emacs-lisp
+(use-package helm
+  :demand t)
+#+end_src
+
+=:demand t= will force the package to be fully loaded right away. It
+effectively disable lazy loading.
+
+
 #+begin_src emacs-lisp
 (use-package helm
   :commands (helm-find-files helm-M-x))

doc/VIMUSERS.org

@@ -386,14 +386,12 @@ that allows easy lazy-loading and configuration of packages. Here are the basics
 to using it:
 
 #+BEGIN_SRC emacs-lisp
-  ;; Basic form of use-package declaration. The :defer t tells use-package to
-  ;; try to lazy load the package.
-  (use-package package-name
-    :defer t)
+  ;; Basic form of use-package declaration. By default the package will be
+  ;; lazy loaded.
+  (use-package package-name)
   ;; The :init section is run before the package loads. The :config section is
   ;; run after the package loads
   (use-package package-name
-    :defer t
     :init
     (progn
       ;; Change some variables

layers/+completion/auto-completion/README.org

@@ -175,7 +175,6 @@ In the file =packages.el= of the python layer:
 
   (defun python/init-company-anaconda ()
     (use-package company-anaconda
-      :defer t
       :init
       (spacemacs|add-company-backends
          :backends company-anaconda