bug-fix, see stackoverflow question 68541899
\UFEFF hopefully makes every SBCL happy
changes to make CMUCL run rtest_encoding.mac in test-batch mode
allow recognized_encoding_p to accept small letters
previously only accepts Lisp integers, now it accepts Maxima integers
: skip walking through *small-primes* when unneccesary
moved tests for to rtestifactor
changing fpprec should not affect printing a previously stored bigfloat