Rename pdf-tools to pdf in pdf layer

layers/+readers/pdf/README.org

@@ -1,4 +1,4 @@
-#+TITLE: pdf-tools layer
+#+TITLE: PDF layer
 
 [[file:img/pdf.png]]
 
@@ -18,7 +18,7 @@
   - [[#occur-mode][Occur mode]]
 
 * Description
-This layer enables support for the [[https://github.com/politza/pdf-tools][pdf-tools]] package.
+This layer enables support for PDF with the [[https://github.com/politza/pdf-tools][pdf-tools]] package.
 
 According to the official repository:
 

layers/+readers/pdf/packages.el

@@ -1,4 +1,4 @@
-;;; packages.el --- pdf-tools Layer packages File for Spacemacs
+;;; packages.el --- PDF Layer packages File for Spacemacs
 ;;
 ;; Copyright (c) 2012-2018 Sylvain Benner
 ;; Copyright (c) 2014-2016 Sylvain Benner & Contributors
@@ -10,9 +10,9 @@
 ;;
 ;;; License: GPLv3
 
-(setq pdf-tools-packages '(pdf-tools))
+(setq pdf-packages '(pdf-tools))
 
-(defun pdf-tools/init-pdf-tools ()
+(defun pdf/init-pdf-tools ()
   (use-package pdf-tools
     :defer t
     :mode (("\\.pdf\\'" . pdf-view-mode))