[Rubocop] Fix indentation in installer spec

spec/unit/installer_spec.rb

@@ -203,21 +203,21 @@ module Pod
 
     describe 'Downloading dependencies' do
 
-        it 'installs head pods' do
-          podfile = Podfile.new do
-            platform :osx, '10.10'
-            pod 'AFNetworking/NSURLSession', :head
-          end
-          @installer.stubs(:podfile).returns(podfile)
-          @installer.stubs(:lockfile).returns(nil)
-          Downloader::Git.any_instance.expects(:download_head).once
-          Downloader::Git.any_instance.expects(:checkout_options).returns({})
-          @installer.prepare
-          @installer.resolve_dependencies
-          @installer.send(:root_specs).map(&:version).map(&:head?).should == [true]
-          @installer.download_dependencies
-          UI.output.should.include 'HEAD based on 2.4.1'
-        end
+      it 'installs head pods' do
+        podfile = Podfile.new do
+          platform :osx, '10.10'
+          pod 'AFNetworking/NSURLSession', :head
+        end
+        @installer.stubs(:podfile).returns(podfile)
+        @installer.stubs(:lockfile).returns(nil)
+        Downloader::Git.any_instance.expects(:download_head).once
+        Downloader::Git.any_instance.expects(:checkout_options).returns({})
+        @installer.prepare
+        @installer.resolve_dependencies
+        @installer.send(:root_specs).map(&:version).map(&:head?).should == [true]
+        @installer.download_dependencies
+        UI.output.should.include 'HEAD based on 2.4.1'
+      end
 
       describe '#install_pod_sources' do