Copy fixities directly from the standard report (other than those provid...

...ed by base)

I discovered this because (>>=) had the same fixity as (.).  Looks like notElem / elem / the ord methods / maybe more were missing too.

I'd said that I'd checked the fixities before, but I only checked the fixity declarations, not whether all of the operators had fixities.  DOH!  My mistake, should have been fixed earlier.