Merge pull request #629 from vyper/master

Added stringex and changed to use #to_url for create directory.

plugins/category_generator.rb

@@ -19,6 +19,8 @@
 # - category_title_prefix: The string used before the category name in the page title (default is
 #                          'Category: ').
 
+require 'stringex'
+
 module Jekyll
 
   # The CategoryIndex class creates a single category page for the specified category.
@@ -106,7 +108,7 @@ module Jekyll
       if self.layouts.key? 'category_index'
         dir = self.config['category_dir'] || 'categories'
         self.categories.keys.each do |category|
-          self.write_category_index(File.join(dir, category.gsub(/_|\P{Word}/, '-').gsub(/-{2,}/, '-').downcase), category)
+          self.write_category_index(File.join(dir, category.to_url), category)
         end
 
       # Throw an exception if the layout couldn't be found.
@@ -171,7 +173,7 @@ ERR
     #
     def category_link(category)
       dir = @context.registers[:site].config['category_dir']
-      "<a class='category' href='/#{dir}/#{category.gsub(/_|\P{Word}/, '-').gsub(/-{2,}/, '-').downcase}/'>#{category}</a>"
+      "<a class='category' href='/#{dir}/#{category.to_url}/'>#{category}</a>"
     end
 
     # Outputs the post.date as formatted html, with hooks for CSS styling.