Less code in begin block

Library/Homebrew/formula.rb

@@ -510,6 +510,7 @@ class Formula
     mkdir_p(logd)
 
     log = File.open(logfn, "w")
+    begin
       log.puts Time.now, "", cmd, args, ""
       log.flush
 
@@ -547,7 +548,8 @@ class Formula
         raise BuildError.new(self, cmd, args)
       end
     ensure
-    log.close if log && !log.closed?
+      log.close unless log.closed?
+    end
   end
 
   private