.

Gemfile

 source 'https://rubygems.org'
 
+ruby '2.0.0'
+
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '4.0.1'
+gem 'rails', '~> 4.0.2'
 
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 4.0.0'

Gemfile.lock

 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (4.0.1)
-      actionpack (= 4.0.1)
+    actionmailer (4.0.2)
+      actionpack (= 4.0.2)
       mail (~> 2.5.4)
-    actionpack (4.0.1)
-      activesupport (= 4.0.1)
+    actionpack (4.0.2)
+      activesupport (= 4.0.2)
       builder (~> 3.1.0)
       erubis (~> 2.7.0)
       rack (~> 1.5.2)
       rack-test (~> 0.6.2)
-    activemodel (4.0.1)
-      activesupport (= 4.0.1)
+    activemodel (4.0.2)
+      activesupport (= 4.0.2)
       builder (~> 3.1.0)
-    activerecord (4.0.1)
-      activemodel (= 4.0.1)
+    activerecord (4.0.2)
+      activemodel (= 4.0.2)
       activerecord-deprecated_finders (~> 1.0.2)
-      activesupport (= 4.0.1)
+      activesupport (= 4.0.2)
       arel (~> 4.0.0)
     activerecord-deprecated_finders (1.0.3)
-    activesupport (4.0.1)
+    activesupport (4.0.2)
       i18n (~> 0.6, >= 0.6.4)
       minitest (~> 4.2)
       multi_json (~> 1.3)
@@ -58,8 +58,8 @@ GEM
     hashie (2.0.5)
     hike (1.2.3)
     httpauth (0.2.0)
-    i18n (0.6.5)
-    jbuilder (1.5.2)
+    i18n (0.6.9)
+    jbuilder (1.5.3)
       activesupport (>= 3.0.0)
       multi_json (>= 1.2.0)
     json (1.8.1)
@@ -92,17 +92,17 @@ GEM
     rack (1.5.2)
     rack-test (0.6.2)
       rack (>= 1.0)
-    rails (4.0.1)
-      actionmailer (= 4.0.1)
-      actionpack (= 4.0.1)
-      activerecord (= 4.0.1)
-      activesupport (= 4.0.1)
+    rails (4.0.2)
+      actionmailer (= 4.0.2)
+      actionpack (= 4.0.2)
+      activerecord (= 4.0.2)
+      activesupport (= 4.0.2)
       bundler (>= 1.3.0, < 2.0)
-      railties (= 4.0.1)
+      railties (= 4.0.2)
       sprockets-rails (~> 2.0.0)
-    railties (4.0.1)
-      actionpack (= 4.0.1)
-      activesupport (= 4.0.1)
+    railties (4.0.2)
+      actionpack (= 4.0.2)
+      activesupport (= 4.0.2)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (10.1.0)
@@ -139,7 +139,7 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     tzinfo (0.3.38)
-    uglifier (2.3.1)
+    uglifier (2.3.2)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
     warden (1.2.3)
@@ -155,7 +155,7 @@ DEPENDENCIES
   devise
   jbuilder (~> 1.2)
   omniauth-google-oauth2
-  rails (= 4.0.1)
+  rails (~> 4.0.2)
   redcarpet
   sass-rails (~> 4.0.0)
   sdoc

app/views/posts/_form.html.erb

@@ -72,7 +72,7 @@
     'use strict';
 
     var confirmUnload = function() {
-      return '前のページに戻りますか？';
+      return 'このページを離れますか？';
     };
     $(window).on('beforeunload', confirmUnload);
     $('#save_button').on('click', function(){