adding cleaning of whitespaces around commas in tag list strings

lib/is_taggable.rb

@@ -6,10 +6,10 @@
 module IsTaggable
   class TagList < Array
     cattr_accessor :delimiter
-    @@delimiter = ', '
+    @@delimiter = ','
 
     def initialize(list)
-      list = list.is_a?(Array) ? list : list.split(@@delimiter)
+      list = list.is_a?(Array) ? list : list.split(@@delimiter).collect(&:strip)
       super
     end
 

test/is_taggable_test.rb

@@ -17,7 +17,7 @@
   expect ["one", "two"] do
     IsTaggable::TagList.delimiter = " "
     n = Comment.new :tag_list => "one two"
-    IsTaggable::TagList.delimiter = ", " # puts things back to avoid breaking following tests
+    IsTaggable::TagList.delimiter = "," # puts things back to avoid breaking following tests
     n.tag_list
   end
 
@@ -53,6 +53,15 @@
     p = Post.new :language_list => "english, french"
     p.language_list.to_s
   end
+
+  # added - should clean up strings with arbitrary spaces around commas
+  expect ["spaces","should","not","matter"] do
+    p = Post.new
+    p.tag_list = "spaces,should,  not,matter"
+    p.save!
+    p.tags.reload
+    p.tag_list
+  end
 
   expect 2 do
     p = Post.new :language_list => "english, french"