Simplify the commit code

Author: GilbertCherrie

app/helpers/catalog_helper/textual_summary.rb

@@ -1,7 +1,7 @@
 module CatalogHelper::TextualSummary
   def tags_from_record
     tags = []
-    tag_categories = {}
+    tag_categories = Hash.new { |h, k| h[k] = [] }
     @record.tags.each do |tag|
       values = tag.name.split('/')
       p = tags.find { |x| x[:label] == values[2].humanize }
@@ -10,11 +10,7 @@ def tags_from_record
         p[:value].push(value)
       else
         name = Classification.find_by(:id => Classification.find_by(:tag_id => tag.id).parent_id).description
-        if tag_categories[name].nil?
-          tag_categories[name] = [value]
-        else
-          tag_categories[name].append(value)
-        end
+        tag_categories[name] << value
       end
     end
     tag_categories.each do |tag_category, tag_values|