zzz: move test-specific comment

Author: cho-m

Formula/z/zzz.rb

@@ -21,12 +21,12 @@ class Zzz < Formula
 
   depends_on :macos
 
-  # No test is possible: this has no --help or --version, it just
-  # sleeps the Mac instantly.
   def install
     system "make", "install", "PREFIX=#{prefix}"
   end
 
+  # No test is possible: this has no --help or --version, it just
+  # sleeps the Mac instantly.
   test do
     assert_predicate bin/"Zzz", :exist?
   end