remove reinvention of #parameterize

lib/slug.rb

@@ -6,27 +6,7 @@
 module Slug
 
   def self.for(string)
-    str = string.dup.strip.downcase
-    
-    # The characters we want to replace with a hyphen
-    str.tr!("·/_,:;.", "\-")
-
-    # Convert to ASCII or remove if transliteration is unknown.
-    str = ActiveSupport::Inflector.transliterate(str, '')
-    
-    # Remove everything except alphanumberic, space, and hyphen characters.
-    str.gsub!(/[^a-z0-9 -]/, '')
-    
-    # Replace multiple spaces with one hyphen.
-    str.gsub!(/\s+/, '-')
-    
-    # Replace multiple hyphens with one hyphen.
-    str.gsub!(/\-+/, '-')
-    
-    # Remove leading and trailing hyphens
-    str.gsub!(/^-|-$/, '')
-
-    str
+    string.parameterize
   end
 
 end