+testing "printf handles positive numbers for %d" \
+ "${bb}printf '%d\n' 3 +3 ' 3' ' +3' 2>&1; echo \$?" \
+ "3\n"\
+"3\n"\
+"3\n"\
+"3\n""0\n" \
+ "" ""
+
+testing "printf handles positive numbers for %i" \
+ "${bb}printf '%i\n' 3 +3 ' 3' ' +3' 2>&1; echo \$?" \
+ "3\n"\
+"3\n"\
+"3\n"\
+"3\n""0\n" \
+ "" ""
+
+testing "printf handles positive numbers for %x" \
+ "${bb}printf '%x\n' 42 +42 ' 42' ' +42' 2>&1; echo \$?" \
+ "2a\n"\
+"2a\n"\
+"2a\n"\
+"2a\n""0\n" \
+ "" ""
+
+testing "printf handles positive numbers for %f" \
+ "${bb}printf '%0.3f\n' .42 +.42 ' .42' ' +.42' 2>&1; echo \$?" \
+ "0.420\n"\
+"0.420\n"\
+"0.420\n"\
+"0.420\n""0\n" \
+ "" ""
+
+