Strip trailing and leading spaces from category names

app/models/category.rb

@@ -121,6 +121,7 @@ class Category < ActiveRecord::Base
 
   def ensure_slug
     if name.present?
+      self.name.strip!
       self.slug = Slug.for(name)
 
       return if self.slug.blank?

spec/models/category_spec.rb

@@ -122,6 +122,18 @@ describe Category do
     end
   end
 
+  it "strips leading blanks" do
+    Fabricate(:category, name: " music").name.should == "music"
+  end
+
+  it "strips trailing blanks" do
+    Fabricate(:category, name: "bugs ").name.should == "bugs"
+  end
+
+  it "strips leading and trailing blanks" do
+    Fabricate(:category, name: "  blanks ").name.should == "blanks"
+  end
+
   describe "short name" do
     let!(:category) { Fabricate(:category, name: 'xx') }
 
@@ -218,7 +230,6 @@ describe Category do
         @topic.category.should == @category
         @category.topic.should == @topic
       end
-
     end
   end