Show diary entry after creation

This allows users to review their post and use the social share
buttons more easily.

Refs #1391

app/controllers/diary_entries_controller.rb

@@ -123,7 +123,7 @@ def create
       # Subscribe user to diary comments
       @diary_entry.subscriptions.create(:user => current_user)
 
-      redirect_to :action => "index", :display_name => current_user.display_name
+      redirect_to diary_entry_path(@diary_entry.user, @diary_entry)
     else
       render :action => "new"
     end

test/controllers/diary_entries_controller_test.rb

@@ -159,7 +159,7 @@ def test_create
       post diary_entries_path(:diary_entry => { :title => "New Title", :body => "This is a new body for the diary entry", :latitude => "1.1",
                                                 :longitude => "2.2", :language_code => "en" })
     end
-    assert_redirected_to :action => :index, :display_name => user.display_name
+    assert_redirected_to diary_entry_path(user, user.diary_entries.last)
     entry = DiaryEntry.last
     assert_equal user.id, entry.user_id
     assert_equal "New Title", entry.title
@@ -184,7 +184,7 @@ def test_create_german
       post diary_entries_path(:diary_entry => { :title => "New Title", :body => "This is a new body for the diary entry", :latitude => "1.1",
                                                 :longitude => "2.2", :language_code => "de" })
     end
-    assert_redirected_to :action => :index, :display_name => user.display_name
+    assert_redirected_to diary_entry_path(user, user.diary_entries.last)
     entry = DiaryEntry.last
     assert_equal user.id, entry.user_id
     assert_equal "New Title", entry.title
@@ -211,7 +211,7 @@ def test_new_spammy
     assert_difference "DiaryEntry.count", 1 do
       post diary_entries_path(:diary_entry => { :title => spammy_title, :body => spammy_body, :language_code => "en" })
     end
-    assert_redirected_to :action => :index, :display_name => user.display_name
+    assert_redirected_to diary_entry_path(user, user.diary_entries.last)
     entry = DiaryEntry.last
     assert_equal user.id, entry.user_id
     assert_equal spammy_title, entry.title