Improve wrap script.

wrap

@@ -3,10 +3,9 @@
 # This file is in public domain.
 
 for file in `git ls-files -m *.po`; do
-	msgattrib $file > $file.temp &
-	mv $file.temp $file
+	msgattrib $file > $file.temp && mv $file.temp $file &
 done
 
-while `ls * | grep ".temp"`; do
-	test
+while ls | grep ".temp" > /dev/null; do
+	continue
 done