ruby: use :toggle and fix location or ruby-mode

layers/+lang/ruby/packages.el

@@ -14,6 +14,7 @@
         bundler
         chruby
         company
+        (enh-ruby-mode :toggle ruby-enable-enh-ruby-mode)
         evil-matchit
         flycheck
         popwin
@@ -21,15 +22,13 @@
         robe
         rspec-mode
         rubocop
+        (ruby-mode :location built-in :toggle (not ruby-enable-enh-ruby-mode))
         ruby-test-mode
         ruby-tools
         rvm
         smartparens
         rake
         ))
-(if ruby-enable-enh-ruby-mode
-    (add-to-list 'ruby-packages 'enh-ruby-mode)
-  (add-to-list 'ruby-packages 'ruby-mode))
 
 (defun ruby/init-bundler ()
   (use-package bundler