[Installer] Minor improvements

lib/cocoapods/installer.rb

@@ -341,6 +341,7 @@ module Pod
     # @return [void]
     #
     def write_lockfiles
+      UI.section "Writing Lockfiles" do
         # checkout_options = sandbox.checkout_options
         @lockfile = Lockfile.generate(podfile, analysis_result.specifications)
 
@@ -352,6 +353,7 @@ module Pod
           @lockfile.write_to_disk(sandbox.manifest_path)
         end
       end
+    end
 
     # Integrates the user projects adding the dependencies on the CocoaPods
     # libraries, setting them up to use the xcconfigs and performing other