Fix slice and #725

I messed up pretty bad at getSlot by searching down the .table array instead of going up, when (index >> 5) did not match. Fixed also two little mistakes in sliceLeft/-Right.
Same comment as above, always use curly braces and have a newline even for small stuff.

The idea is that adding a line within a while loop should not also cause a reformat of unrelated stuff.

I'm trying to be stricter about style stuff and generally want to follow the Google JS style guide.