Fix the syntax error in printf.r
Fix the syntax error in printf.r

Also added some more tests

codebybrett/ren-c,kealist/ren-c,giuliolunati/ren-c,giuliolunati/ren-c,hostilefork/rebol,hostilefork/rebol,giuliolunati/ren-c,rgchris/ren-c,rgchris/ren-c,codebybrett/ren-c,giuliolunati/ren-c,draegtun/ren-c,draegtun/ren-c,hostilefork/rebol,kealist/ren-c,kealist/ren-c,codebybrett/ren-c,draegtun/ren-c,codebybrett/ren-c,kealist/ren-c,draegtun/ren-c,draegtun/ren-c,rgchris/ren-c,codebybrett/ren-c,kealist/ren-c,kealist/ren-c,giuliolunati/ren-c,rgchris/ren-c,draegtun/ren-c,codebybrett/ren-c,hostilefork/rebol,hostilefork/rebol,hostilefork/rebol,rgchris/ren-c