diff --git a/Gemfile b/Gemfile
index 1050e3b2a..c08ae6b7e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,8 +10,6 @@ group :test do
   gem "vcr"
   gem "webmock"
   gem "timecop"
-  gem "test-unit-rails"
-  gem "ruby-prof"
 end
 
 group :assets do
diff --git a/Gemfile.lock b/Gemfile.lock
index f155e1220..1b9ccc57f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -52,12 +52,6 @@ GEM
       net-ssh-gateway (>= 1.1.0)
     capistrano-unicorn (0.1.10)
       capistrano
-    capybara (2.2.0)
-      mime-types (>= 1.16)
-      nokogiri (>= 1.3.3)
-      rack (>= 1.0.0)
-      rack-test (>= 0.5.4)
-      xpath (~> 2.0)
     chronic (0.9.1)
     coderay (1.0.9)
     crack (0.4.1)
@@ -154,7 +148,6 @@ GEM
       json (~> 1.4)
     ref (1.0.5)
     rmagick (2.13.2)
-    rr (1.1.2)
     ruby-prof (0.13.0)
     safe_yaml (0.9.5)
     sanitize (2.0.6)
@@ -186,25 +179,6 @@ GEM
     statistics2 (0.54)
     term-ansicolor (1.2.2)
       tins (~> 0.8)
-    test-unit (2.5.5)
-    test-unit-activesupport (1.0.1)
-      activesupport
-      test-unit
-    test-unit-capybara (1.0.4)
-      capybara (>= 2.1.0)
-      json
-      test-unit (>= 2.5.3)
-    test-unit-notify (1.0.1)
-      test-unit (>= 2.4.9)
-    test-unit-rails (1.0.2)
-      rails
-      test-unit-activesupport
-      test-unit-capybara
-      test-unit-notify
-      test-unit-rr
-    test-unit-rr (1.0.3)
-      rr (>= 1.1.1)
-      test-unit (>= 2.5.2)
     therubyracer (0.11.4)
       libv8 (~> 3.11.8.12)
       ref
@@ -235,8 +209,6 @@ GEM
       activesupport (>= 2.3.4)
       chronic (>= 0.6.3)
     xml-simple (1.1.2)
-    xpath (2.0.0)
-      nokogiri (~> 1.3)
 
 PLATFORMS
   ruby
@@ -273,7 +245,6 @@ DEPENDENCIES
   simplecov
   statistics2
   term-ansicolor
-  test-unit-rails
   therubyracer
   timecop
   uglifier (>= 1.0.3)
diff --git a/app/logical/d_text.rb b/app/logical/d_text.rb
index bd72020ca..7db38e7f5 100644
--- a/app/logical/d_text.rb
+++ b/app/logical/d_text.rb
@@ -198,11 +198,17 @@ class DText
 
       when /\[code\](?!\])/
         flags[:code] = true
+        stack << "pre"
         '<pre>'
 
       when /\[\/code\](?!\])/
         flags[:code] = false
-        '</pre>'
+        if stack.last == "pre"
+          stack.pop
+          "</pre>"
+        else
+          ""
+        end
 
       when /\[expand(?:\=([^\]]*))?\](?!\])/
         stack << "expandable"
diff --git a/app/models/pool.rb b/app/models/pool.rb
index 386fc1413..86c483297 100644
--- a/app/models/pool.rb
+++ b/app/models/pool.rb
@@ -125,8 +125,12 @@ class Pool < ActiveRecord::Base
     name.gsub(/\s+/, "_")
   end
 
-  def self.normalize_post_ids(post_ids)
-    post_ids.scan(/\d+/).uniq.join(" ")
+  def self.normalize_post_ids(post_ids, unique)
+    hoge = post_ids.scan(/\d+/)
+    if unique
+      hoge = hoge.uniq
+    end
+    hoge.join(" ")
   end
 
   def self.find_by_name(name)
@@ -139,6 +143,14 @@ class Pool < ActiveRecord::Base
     end
   end
 
+  def is_series?
+    category == "series"
+  end
+
+  def is_collection?
+    category == "collection"
+  end
+
   def initialize_is_active
     self.is_deleted = false if is_deleted.nil?
     self.is_active = true if is_active.nil?
@@ -165,7 +177,7 @@ class Pool < ActiveRecord::Base
   end
 
   def normalize_post_ids
-    self.post_ids = self.class.normalize_post_ids(post_ids)
+    self.post_ids = self.class.normalize_post_ids(post_ids, is_collection?)
   end
 
   def revert_to!(version)
diff --git a/test/unit/dtext_test.rb b/test/unit/dtext_test.rb
index f5737393b..4fbde0e30 100644
--- a/test/unit/dtext_test.rb
+++ b/test/unit/dtext_test.rb
@@ -38,7 +38,7 @@ class DTextTest < ActiveSupport::TestCase
   end
 
   def test_spoilers_with_no_closing_tag_1
-    assert_equal("<div class=\"spoiler\">\n<p>this is a spoiler with no closing tag</p>\n<p>new text</p>\n</div>", p("[spoiler]this is a spoiler with no closing tag\n\nnew text"))
+    assert_equal("<div class=\"spoiler\"><p>this is a spoiler with no closing tag</p><p>new text</p></div>", p("[spoiler]this is a spoiler with no closing tag\n\nnew text"))
   end
 
   def test_spoilers_with_no_closing_tag_2
@@ -50,7 +50,7 @@ class DTextTest < ActiveSupport::TestCase
   end
 
   def test_spoilers_nested
-    assert_equal("<div class=\"spoiler\">\n<p>this is</p>\n<div class=\"spoiler\"><p>a nested</p></div>\n<p>spoiler</p>\n</div>", p("[spoiler]this is [spoiler]a nested[/spoiler] spoiler[/spoiler]"))
+    assert_equal("<div class=\"spoiler\"><p>this is</p><div class=\"spoiler\"><p>a nested</p></div><p>spoiler</p></div>", p("[spoiler]this is [spoiler]a nested[/spoiler] spoiler[/spoiler]"))
   end
 
   def test_paragraphs
@@ -74,7 +74,7 @@ class DTextTest < ActiveSupport::TestCase
   end
 
   def test_quote_blocks_nested
-    assert_equal("<blockquote>\n<p>a</p>\n<blockquote><p>b</p></blockquote>\n<p>c</p>\n</blockquote>", p("[quote]\na\n[quote]\nb\n[/quote]\nc\n[/quote]"))
+    assert_equal("<blockquote><p>a</p><blockquote><p>b</p></blockquote><p>c</p></blockquote>", p("[quote]\na\n[quote]\nb\n[/quote]\nc\n[/quote]"))
   end
 
   def test_code