Update susy gem installation command.

middleman-core/lib/middleman-core/templates/shared/config.tt

@@ -1,9 +1,9 @@
-### 
+###
 # Compass
 ###
 
 # Susy grids in Compass
-# First: gem install compass-susy-plugin
+# First: gem install susy --pre
 # require 'susy'
 
 # Change Compass configuration
@@ -16,13 +16,13 @@
 ###
 
 # Per-page layout changes:
-# 
+#
 # With no layout
 # page "/path/to/file.html", :layout => false
-# 
+#
 # With alternative layout
 # page "/path/to/file.html", :layout => :otherlayout
-# 
+#
 # A path which all have the same layout
 # with_layout :admin do
 #   page "/admin/*"
@@ -72,21 +72,21 @@ set :images_dir, '<%= options[:images_dir] -%>'
 configure :build do
   # For example, change the Compass output style for deployment
   # activate :minify_css
-  
+
   # Minify Javascript on build
   # activate :minify_javascript
-  
+
   # Enable cache buster
   # activate :cache_buster
-  
+
   # Use relative URLs
   # activate :relative_assets
-  
+
   # Compress PNGs after build
   # First: gem install middleman-smusher
   # require "middleman-smusher"
   # activate :smusher
-  
+
   # Or use a different image path
   # set :http_path, "/Content/images/"
 end