Fix wrong indent

![2014-09-09 22 06 21](https://cloud.githubusercontent.com/assets/1207985/4201784/251c9cf0-3822-11e4-8f93-8a157e442ca4.png)
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<pre class="code">    describe "with valid information" do
      before do
        fill_in "Name",         with: "Example User"
        fill_in "Email",        with: "user@example.com"
        fill_in "Password",     with: "foobar"
        fill_in "Confirmation", with: "foobar"
      end
      it "should create a user" do
        expect { click_button submit }.to change(User, :count).by(1)
      end
      describe "after saving the user" do
        before { click_button submit }
        let(:user) { User.find_by(email: 'user@example.com') }
        it { should have_link('Sign out') }
        it { should have_title(user.name) }
        it { should have_selector('div.alert.alert-success', text: 'Welcome') }
      end
      describe "followed by signout" do
        before { click_link "Sign out" }
        it { should have_link('Sign in') }
      end
    end
  end
end</pre>
Signinしていない状態なので、signoutがクリックできない＝テストに失敗します。

正しいのは以下のように「describe "after saving the user" do」の下位に、「describe "followed by signout" do」が来る必要があります。

<pre class="code">      describe "after saving the user" do
        before { click_button submit }
        let(:user) { User.find_by(email: 'user@example.com') }

        it { should have_link('Sign out') }
        it { should have_title(user.name) }
        it { should have_selector('div.alert.alert-success', text: 'Welcome') }

        describe "followed by signout" do
          before { click_link "Sign out" }
          it { should have_link('Sign in') }
        end
      end
    end
  end
end</pre>