# '+0' canonical zero value
# ' -123 123 123' canonical value '-123123123'
# '1 23 456 7890' canonical value '+1234567890'
-# Output values always always in canonical form
+# Output values always in canonical form
#
# Actual math is done in an internal format consisting of an array
# whose first element is the sign (/^[+-]$/) and whose remaining