Only a mere 71 bytes savings compared to the other PR, but this has tests and does minimal "other stuff"
jQuery Size - compared to last make
250195 (+11) jquery.js
94170 (-48) jquery.min.js
33437 (-17) jquery.min.js.gz
Always use rscriptType in jQuery.clean(); Includes test. Fixes #11323
TODO: Look into seemingly related IE7 fail that happened milliseconds after I pushed due to impatience.